The impact of nitrogen fertilizer use on greenhouse gas emissions in an oil palm plantation associated with land use change
Faradiella Mohd Kusin
Corresponding author
Department of Environmental Sciences and Environmental Forensics Research Centre, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia
Nurul Izzati Mat Akhir
Department of Environmental Sciences, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia
Ferdaus Mohamat-Yusuff
Department of Environmental Sciences and Environmental Forensics Research Centre, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia
Muhamad Awang
SEGi University, Kota Damansara, 47810 Petaling Jaya, Selangor, Malaysia
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rainfall in Sindh during the 2011 monsoon" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => array:2 [ 0 => "es" 1 => "en" ] "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "231" "paginaFinal" => "241" ] ] "contieneResumen" => array:2 [ "es" => true "en" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0020" "etiqueta" => "Fig. 4" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr4.jpeg" "Alto" => 819 "Ancho" => 1224 "Tamanyo" => 336836 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Terrain conditions of Pakistan.</p>" ] ] ] "autores" => array:6 [ 0 => array:2 [ "autoresLista" => "Ge Fei" "autores" => array:1 [ 0 => array:2 [ "nombre" => "Ge" "apellidos" => "Fei" ] ] ] 1 => 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nitrogen fertilizer use on greenhouse gas emissions in an oil palm plantation associated with land use change" "tieneTextoCompleto" => true "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "243" "paginaFinal" => "250" ] ] "autores" => array:4 [ 0 => array:4 [ "autoresLista" => "Faradiella Mohd Kusin" "autores" => array:1 [ 0 => array:4 [ "nombre" => "Faradiella" "apellidos" => "Mohd Kusin" "email" => array:1 [ 0 => "faradieUa@upm.edu.my" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] ] "afiliaciones" => array:1 [ 0 => array:2 [ "entidad" => "Department of Environmental Sciences and Environmental Forensics Research Centre, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia" "identificador" => "aff0005" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "*" "correspondencia" => "Corresponding author" ] ] ] 1 => array:3 [ "autoresLista" => "Nurul Izzati Mat Akhir" "autores" => array:1 [ 0 => array:2 [ "nombre" => "Nurul Izzati Mat" "apellidos" => "Akhir" ] ] "afiliaciones" => array:1 [ 0 => array:2 [ "entidad" => "Department of Environmental Sciences, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia" "identificador" => "aff0010" ] ] ] 2 => array:3 [ "autoresLista" => "Ferdaus Mohamat-Yusuff" "autores" => array:1 [ 0 => array:2 [ "nombre" => "Ferdaus" "apellidos" => "Mohamat-Yusuff" ] ] "afiliaciones" => array:1 [ 0 => array:2 [ "entidad" => "Department of Environmental Sciences and Environmental Forensics Research Centre, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 UPM Serdang, Malaysia" "identificador" => "aff0015" ] ] ] 3 => array:3 [ "autoresLista" => "Muhamad Awang" "autores" => array:1 [ 0 => array:2 [ "nombre" => "Muhamad" "apellidos" => "Awang" ] ] "afiliaciones" => array:1 [ 0 => array:2 [ "entidad" => "SEGi University, Kota Damansara, 47810 Petaling Jaya, Selangor, Malaysia" "identificador" => "aff0020" ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0025" "etiqueta" => "Fig. 5" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr5.jpeg" "Alto" => 519 "Ancho" => 944 "Tamanyo" => 37866 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">GHG emissions during tha plantation stage of oil palm production.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">1</span><span class="elsevierStyleSectionTitle" id="sect0020">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">The establishment of oil palm plantations in Malaysia has rapidly expanded in the past 25 years, especially in the west coast of the Malaysian Peninsula, where soil is most fertile and productive (<a class="elsevierStyleCrossRef" href="#bib0065">Henson, 2005</a>). Oil palm has been extensively planted in parts of East Malaysia on newly explored forest land. Generally, oil palm plantations in this country have been developed from logged-over, degraded forest and also as replacement of other crops such as rubber, coconut and cocoa, since these crops have become less profitable than oil palm (<a class="elsevierStyleCrossRef" href="#bib0120">MPOB, 2001</a>; <a class="elsevierStyleCrossRef" href="#bib0060">Henson, 2004</a>). Greenhouse gases (GHG) emissions from land use change are regularly debated, particularly in relation to biofuels (e.g., establishing new plantations on agricultural land). Emissions are in particular related to changes in aboveground and belowground biomass, as well as soil organic matter (<a class="elsevierStyleCrossRef" href="#bib0010">Brinkmann Consultancy, 2009</a>). Specifically, the establishment and operation of a new plantation lead to the removal of the original aboveground and belowground carbon stocks (e.g., forest, grassland, etc.). On the other hand, a plantation stores carbon through the growth of oil palms.</p><p id="par0010" class="elsevierStylePara elsevierViewall">Oil palm is a perennial crop. There are few important phases in its life cycle, beginning from the agricultural phase (establishment and growth of the plantation) through the oil extraction phase (<a class="elsevierStyleCrossRef" href="#bib0015">Castanheira <span class="elsevierStyleItalic">et al.,</span> 2014</a>). The growth stages of oil palm include activities related to the development of this plant, whereby typically three stages are considered throughout its lifetime, i.e. nursery, immature plantation and mature plantation (<a class="elsevierStyleCrossRef" href="#bib0135">Schmidt, 2007</a>). It is believed that the most significant contribution to global warming from an oil palm plantation is from the agricultural stage, i.e. cultivating (15%), clearing (17%) and replanting (18%) (Schmidt, 2010). The emissions arising from operations during oil palm growth and fresh fruit bunches (FFBs) processing are in particular related to the use of fossil fuels for internal transport and machinery, fertilizers, fuels for the palm oil mill, and emissions from the palm oil mill effluent (POME) (<a class="elsevierStyleCrossRef" href="#bib0010">Brinkmann Consultancy, 2009</a>).</p><p id="par0015" class="elsevierStylePara elsevierViewall">Common inputs of oil palm fertilizers comprise nitrogen fertilizers (i.e., ammonium nitrate, ammonium sulphate, urea and ammonium chloride), phosphate rock, potassium chloride and kieserite. The emissions released may vary between the type of fertilizers and the mode of production. Specifically, GHG emissions related to the use of fertilizers in an oil palm plantation include nitrous oxide (N<span class="elsevierStyleInf">2</span>O) emissions from the application of nitrogen fertilizers. According to the Intergovernmental Panel on Climate Change (IPCC) guidelines, 1% of N<span class="elsevierStyleInf">2</span>O-N is emitted from the total N applied during fertilizer application. Emissions from fertilizer application represent more than 50% of the overall plantation emissions (Schmidt, 2010; <a class="elsevierStyleCrossRef" href="#bib0015">Castanheira <span class="elsevierStyleItalic">et al.,</span> 2014</a>). The amount of fertilizer used in an oil palm plantation may result in high N<span class="elsevierStyleInf">2</span>O emission into the atmosphere, ultimately leading to significant global warming (<a class="elsevierStyleCrossRef" href="#bib0025">Corley and Tinker, 2003</a>).</p><p id="par0020" class="elsevierStylePara elsevierViewall">N<span class="elsevierStyleInf">2</span>O is a potent greenhouse gas with a global warming potential over a 100-yr. period 298 times higher than carbon dioxide (CO<span class="elsevierStyleInf">2</span>) (<a class="elsevierStyleCrossRef" href="#bib0080">IPCC, 2007</a>). Agriculture contributes about 42% ofthe increasing N<span class="elsevierStyleInf">2</span>O emission into the atmosphere. N<span class="elsevierStyleInf">2</span>O is produced in agricultural soils by microbial transformation of compounds that contain nitrogen, such as fertilizer and animal dung and urine (<a class="elsevierStyleCrossRef" href="#bib0045">Giltrap <span class="elsevierStyleItalic">et al</span>., 2014</a>). Artificial fertilizers are applied to boost the crop's growth (<a class="elsevierStyleCrossRef" href="#bib0030">De Datta, 1995</a>). The inputs of N-fertilizer can occur through either direct or indirect pathways. Direct N<span class="elsevierStyleInf">2</span>O emission occurs from direct addition of N-fertilizer on the soil whereas indirect N<span class="elsevierStyleInf">2</span>O emission may results from processes such as N-deposition from the atmosphere, N-fixation by legumes, and decomposition of biomass residues (<a class="elsevierStyleCrossRef" href="#bib0135">Schmidt, 2007</a>; <a class="elsevierStyleCrossRef" href="#bib0085">Millar <span class="elsevierStyleItalic">et al.,</span> 2010</a>). The increase in available mineral N in soil may enhance the formation<a name="p3"></a> of N<span class="elsevierStyleInf">2</span>O through the process of nitrification and denitrification and its emission to the atmosphere (<a class="elsevierStyleCrossRef" href="#bib0115">Mosquera <span class="elsevierStyleItalic">et al.,</span> 2007</a>; <a class="elsevierStyleCrossRef" href="#bib0070">Hewitta <span class="elsevierStyleItalic">et al.,</span> 2009</a>; <a class="elsevierStyleCrossRef" href="#bib0150">Vandermeer <span class="elsevierStyleItalic">et al.,</span> 2009</a>). Generally, operations during the growth stages, such as transportation, FFB processing and use of palm oil-derived products may increase N<span class="elsevierStyleInf">2</span>O emissions to the atmosphere (<a class="elsevierStyleCrossRef" href="#bib0090">Klaarenbeeksingel, 2009</a>). The focus of this study is mainly on the growth stages of oil palm, in which the GHG emissions of agricultural-related activities were estimated. Additionally, the impact on GHG emissions of land use change resulting from the establishment of an oil palm plantation was evaluated. Therefore, in this study we attempt to evaluate the impact of nitrogen fertilizers on the direct emission of GHG and to incorporate the indirect emission due to the expansion (conversion) of the oil palm plantation from the previous land use on a site-specific basis.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">2</span><span class="elsevierStyleSectionTitle" id="sect0025">Materials and methods</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">2.1</span><span class="elsevierStyleSectionTitle" id="sect0030">Study site and data</span><p id="par0025" class="elsevierStylePara elsevierViewall">The study was conducted at Kempas Estate, an oil palm plantation located in the north of Malacca/Johor, in the state of Malacca, covering an area of 1700 ha (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>). The average production of the oil palm plantation, managed and operated by Sime Darby Plantation Malaysia, is 24.11 Mt/ha of FFBs. Kempas Estate land use changed from a previous rubber plantation into an oil palm plantation.</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0030" class="elsevierStylePara elsevierViewall">Data of nitrous oxide emissions were estimated from the amount of applied N-fertilizer, obtained from the scheduled fertilizing scheme between 1986-2009. Other relevant data for estimating N-related emissions were obtained from <a class="elsevierStyleCrossRef" href="#bib0135">Schmidt (2007)</a> for average Malaysian oil palm-related emissions. For assessing emissions from oil palms of different ages, data from the year 2012 comparing immature and mature plants was used. Oil palms were classified as immature (< 5 years) and mature (> 5 years). The typical life cycle of an oil palm is about 25-30 yrs., then new palms should be replanted (<a class="elsevierStyleCrossRef" href="#bib0020">Chase and Henson, 2010</a>). Organic carbon, soil organic matter and other relevant values for estimating the carbon stock were determined experimentally in <a class="elsevierStyleCrossRef" href="#bib0110">Mejan (2013)</a>. Emissions from fuel use (e.g., for internal transportation within the estate) were determined in <a class="elsevierStyleCrossRef" href="#bib0005">Abdullah (2013)</a>.<a name="p4"></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">2.2</span><span class="elsevierStyleSectionTitle" id="sect0035">Estimation of GHG emissions and carbon stock changes</span><p id="par0035" class="elsevierStylePara elsevierViewall">The amount of direct N<span class="elsevierStyleInf">2</span>O emissions from nitrogen fertilizer application in Kempas Estate was estimated by incorporating the type of peat soil, based on the model described by the IPCC. The equation for estimating N<span class="elsevierStyleInf">2</span>O emissions is as follows (<a class="elsevierStyleCrossRef" href="#bib0075">IPCC, 2006</a>):<elsevierMultimedia ident="eq0005"></elsevierMultimedia></p><p id="par0040" class="elsevierStylePara elsevierViewall">where <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf">S<span class="elsevierStyleItalic">N</span></span> is the annual amount of synthetic N-fertilizer applied to the soils (kg N ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">ON</span></span> is the annual amount of organic N-fertilizer applied (kg N ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic"><span class="elsevierStyleSmallCaps">cr</span></span></span> is the amount of nitrogen in crop residues (aboveground and belowground) returned to soils annually (kg N ha<span class="elsevierStyleSup">1</span>); <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic"><span class="elsevierStyleSmallCaps">som</span></span></span> is the annual amount of mineralized N in mineral soils, in association with loss of soil C from soil organic matter as a result of changes to land use or management (kg N ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">SOM</span></span>is the area of organic soils cultivated annually (ha); <span class="elsevierStyleItalic">EF</span><span class="elsevierStyleInf">1</span> is the emission factor for emissions from N inputs (kg N<span class="elsevierStyleInf">2</span>O-N/kg N input); 0.0125 is the default emission factor used in this study; <span class="elsevierStyleItalic">EF</span><span class="elsevierStyleInf">2</span> is the emission factor for emissions from organic soil cultivation (kg N<span class="elsevierStyleInf">2</span>O-N/ha-yr); and 16 was used as default emission factor.</p><p id="par0045" class="elsevierStylePara elsevierViewall">CO<span class="elsevierStyleInf">2</span>-eq is the conversion of other gases such as nitrogen to the equivalent amount of carbon dioxide based on its global warming potential (GWP). In order to calculate CO<span class="elsevierStyleInf">2</span> equivalents, standard ratios are used to convert other gases into equivalent amounts of CO<span class="elsevierStyleInf">2</span>, which describes their total warming impact relative to CO<span class="elsevierStyleInf">2</span> over a set period. Emissions were converted into CO<span class="elsevierStyleInf">2</span>-eqs using the GWP of the gases. According to the <a class="elsevierStyleCrossRef" href="#bib0075">IPCC (2006)</a>, the equation is as follows:<elsevierMultimedia ident="eq0010"></elsevierMultimedia></p><p id="par0050" class="elsevierStylePara elsevierViewall">where <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">SN</span></span> represents the amount of synthetic N-fertilizer applied to soils (kg N yr<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">E</span>1</span> is the emission factor for N<span class="elsevierStyleInf">2</span>O emissions from N inputs (kg N<span class="elsevierStyleInf">2</span>O-N kg N input<span class="elsevierStyleSup">–1</span>); 44/28 is a conversion factor of N<span class="elsevierStyleInf">2</span>O-N emissions to N<span class="elsevierStyleInf">2</span>O emissions; and GWP represents the GWP of N<span class="elsevierStyleInf">2</span>O (t CO<span class="elsevierStyleInf">2</span>-eq).</p><p id="par0055" class="elsevierStylePara elsevierViewall">The amount of carbon stocks was estimated according to the IPCC guidelines as follows:<elsevierMultimedia ident="eq0015"></elsevierMultimedia></p><p id="par0060" class="elsevierStylePara elsevierViewall">where <span class="elsevierStyleItalic">CS</span> are the carbon stocks; <span class="elsevierStyleItalic">SOC</span> is the soil organic carbon (<span class="elsevierStyleItalic">t C</span> ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">C</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">veg</span></span> is the above and belowground vegetation carbon stock (tC ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">C</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">BM</span></span> is the carbon stock in living biomass (above and belowground biomass) (<span class="elsevierStyleItalic">t C</span> ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">C</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">DOM</span></span> is the carbon stock in dead organic matter (t <span class="elsevierStyleItalic">C</span> ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic"><span class="elsevierStyleSmallCaps">lu</span></span></span> is the factor reflecting the difference in <span class="elsevierStyleItalic">SOC</span> associated with land use; <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic"><span class="elsevierStyleSmallCaps">mg</span></span></span>is the factor associated with management practice; and <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">I</span></span> is the factor associated with different levels of carbon input to soil. The <span class="elsevierStyleItalic">SOC</span> and <span class="elsevierStyleItalic">C</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">DOM</span></span> values for an oil palm plantation were determined from field experiments. The value of <span class="elsevierStyleItalic">C</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">BM</span></span> was taken from <a class="elsevierStyleCrossRef" href="#bib0010">Brinkmann Consultancy (2009)</a>, which is relevant for the Malaysian oil palm industry. The values of <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic"><span class="elsevierStyleSmallCaps">lu</span></span></span>, <span class="elsevierStyleItalic">F</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic"><span class="elsevierStyleSmallCaps">mg</span></span></span> and were taken from the IPCC guidelines as 1, 1.22 and 1, respectively.</p><p id="par0065" class="elsevierStylePara elsevierViewall">The calculation of carbon stock changes and the resulting CO<span class="elsevierStyleInf">2</span>-eq emissions were determined according to the IPCC guidelines as:<elsevierMultimedia ident="eq0020"></elsevierMultimedia></p><p id="par0070" class="elsevierStylePara elsevierViewall">where CO<span class="elsevierStyleInf">2</span>-eq is the annualized CO<span class="elsevierStyleInf">2</span>-eq emission from carbon stock change (<span class="elsevierStyleItalic">t</span> CO<span class="elsevierStyleInf">2</span>-eq <span class="elsevierStyleItalic">t</span><span class="elsevierStyleSup">–1</span> PO); Δ<span class="elsevierStyleItalic">CS</span> are the changes in carbon stocks (<span class="elsevierStyleItalic">t</span> C ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">CS</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">R</span></span> is the carbon stock of the reference (previous) land use (t C ha<span class="elsevierStyleSup">–1</span>); <span class="elsevierStyleItalic">CS</span><span class="elsevierStyleInf"><span class="elsevierStyleItalic">A</span></span> is the carbon stock of the actual land use (oil palm plantation) (<span class="elsevierStyleItalic">t C</span> ha<span class="elsevierStyleSup">–1</span>); and <span class="elsevierStyleItalic">P</span> is the palm oil productivity (<span class="elsevierStyleItalic">t PO</span> ha<span class="elsevierStyleSup">–1</span>).</p></span></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">3</span><span class="elsevierStyleSectionTitle" id="sect0040">Results and discussion</span><p id="par0075" class="elsevierStylePara elsevierViewall">The emissions from carbon stock changes within Kempas Estate were estimated for assessing the impact of land use change in the plantation development. The estate was transformed into an oil palm plantation from a previous rubber plantation area because rubber is no longer a profitable crop compared to oil palm (<a class="elsevierStyleCrossRef" href="#bib0065">Henson, 2005</a>). The estimated emissions are presented in <a class="elsevierStyleCrossRef" href="#fig0010">Figure 2a,b</a>.</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">As noted in <a class="elsevierStyleCrossRef" href="#fig0010">Figure 2a, b</a>, emissions show positive values regardless of the age of the palms. This indicates that the transformation of land use into an oil palm development increased GHG emissions (although at a relatively low amount). In other words, the transformation into an oil palm plantation from rubber estate<a name="p5"></a> looses its carbon content (indicated by carbon release), often referred to as carbon debts of the plantation. The emissions of GHG from carbon stock changes range between 1.62-3.48 t CO<span class="elsevierStyleInf">2</span>-eq/ha (<a class="elsevierStyleCrossRef" href="#fig0010">Fig. 2a</a>), and between 5.43-11.62 kg CO<span class="elsevierStyleInf">2</span>-eq/MJ palm oil (<a class="elsevierStyleCrossRef" href="#fig0010">Fig. 2b</a>). This corresponds to the carbon stocks of the oil plantation, which are estimated between 77-87 t C/ha. Notwithstanding this carbon loss due to land conversion, this phenomenon has been anticipated in literature. In fact, the replacement of a rubber estate into an oil palm plantation may result in the production of synthetic rubber from fossil oil elsewhere to meet the world rubber demand, which is the industrial process that produces highest carbon emissions (<a class="elsevierStyleCrossRef" href="#bib0055">Hansen <span class="elsevierStyleItalic">et al.,</span> 2014</a>). Nevertheless, carbon emissions from the conversion of a rubber estate are much lesser than the conversion of a tropical forest (high carbon stock land) into an oil palm estate (<a class="elsevierStyleCrossRef" href="#bib0065">Henson, 2005</a>; <a class="elsevierStyleCrossRef" href="#bib0010">Brinkmann Consultancy, 2009</a>; <a class="elsevierStyleCrossRef" href="#bib0015">Castanheira, 2014</a>; <a class="elsevierStyleCrossRef" href="#bib0055">Hansen <span class="elsevierStyleItalic">et al.,</span> 2014</a>). Some studies state that there is no difference in the estimated soil carbon content in rubber and oil palm plantations (e.g., Lai, 2004; <a class="elsevierStyleCrossRef" href="#bib0140">Siangjaeo <span class="elsevierStyleItalic">et al.,</span> 2011</a>).</p><p id="par0085" class="elsevierStylePara elsevierViewall">Variations (yearly average) in nitrous oxide and the resulting CO<span class="elsevierStyleInf">2</span>-eq emissions in the oil palm estate from 1986-2009 are shown in <a class="elsevierStyleCrossRef" href="#fig0015">Figure 3</a>, which shows that there is no significant difference in the yearly variation of emissions. On average, about 22.3 kg N<span class="elsevierStyleInf">2</span>O-N/ha and 1270.5 kg CO<span class="elsevierStyleInf">2</span>-eq/ha were released during the period.</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0090" class="elsevierStylePara elsevierViewall">The emissions from N-fertilizer application during the plantation stage of the palm oil production were analyzed for oil palms of different ages at Kempas Estate. <a class="elsevierStyleCrossRef" href="#tbl0005">Table I</a> shows the amount of N-fertilizer applied and the calculated N<span class="elsevierStyleInf">2</span>O and CO<span class="elsevierStyleInf">2</span>-equivalent (CO<span class="elsevierStyleInf">2</span>-eq) emissions according to the age of the palms. Overall, the mean values of applied N-fertilizer range between 108-134 kg N/ha, with the release of 19.11-22.17 kg of N<span class="elsevierStyleInf">2</span>O-N/ha, resulting in an emission of 1052.26-1209.51 kg of CO<span class="elsevierStyleInf">2</span>-eq /ha. A slightly greater amount of N-fertilizer was applied for oil palms aged between 5-20 years compared to other categories (i.e., < 5 years and > 20 years) (<a class="elsevierStyleCrossRef" href="#fig0020">Fig. 4a</a>). For immature palms, empty fruit bunches were typically used as an additional source of fertilizer in addition to N-fertilizer, for assisting the growth of the newly planted palms. Generally, the amounts of N-fertilizer used in the estate are slightly higher than the average in Malaysia, which are of 90 and 105 kg N/ha for immature and mature oil palms, respectively, as reported by <a class="elsevierStyleCrossRef" href="#bib0135">Schmidt (2007)</a>.</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">Despite little variations in the amount of N<span class="elsevierStyleInf">2</span>O released, the amount of the emission is relatively higher for immature palms < 5 years, i.e. 22 kg N<span class="elsevierStyleInf">2</span>O-N/ha compared to ~19 kg N<span class="elsevierStyleInf">2</span>O-N/ha for mature palms (<a class="elsevierStyleCrossRef" href="#fig0020">Fig. 4b</a>), suggesting that N<span class="elsevierStyleInf">2</span>O emissions may decrease as oil palms develop maturely to more than 20 years. Note that the relatively higher N<span class="elsevierStyleInf">2</span>O emission during the immature stage may be attributed to several factors such as<a name="p6"></a> N-fixation processes, return of nitrogen in crop residues and decomposition of biomass (<a class="elsevierStyleCrossRef" href="#bib0135">Schmidt, 2007</a>). The high content of N supply during the early stage of palm development is essential to ensure favorable growth conditions and to catalyze the rapid growth of the palm (<a class="elsevierStyleCrossRef" href="#bib0145">Sugiyama <span class="elsevierStyleItalic">et al.,</span> 1984</a>; <a class="elsevierStyleCrossRef" href="#bib0050">Greef, 1994</a>; <a class="elsevierStyleCrossRef" href="#bib0130">Sawan <span class="elsevierStyleItalic">et al.,</span> 2001</a>). On the other hand, the resulting CO<span class="elsevierStyleInf">2</span>-eq emission is relatively higher for oil palms aged between 5-20 years (<a class="elsevierStyleCrossRef" href="#fig0020">Fig. 4c</a>), which is mainly due to the greater amount of N-fertilizer applied, coupled with the fraction of N<span class="elsevierStyleInf">2</span>O contribution, as discussed earlier. Therefore, it can be seen that the contribution from the N-fertilizer applied is very important, since it reflects the overall CO<span class="elsevierStyleInf">2</span>-eq emissions resulting from N-related emissions. Despite this, there is no clear relationship between N<span class="elsevierStyleInf">2</span>O or CO<span class="elsevierStyleInf">2</span>-eq emissions and the age of the oil palms.</p><p id="par0100" class="elsevierStylePara elsevierViewall">Aside from the N-related emissions, contributions from P-related emissions are also significant to reflect the impact from the use of fertilizers. Similarly, emissions from fuel use (e.g., for internal transportation) are another major input of GHG during the growing stage of the palm oil plantation. Contributions from major inputs of GHG in the estate are illustrated in <a class="elsevierStyleCrossRef" href="#fig0025">Figure 5</a>. N- and P-related emissions, as well as fuel emissions contribute to about 79% and 21% of total GHG emissions, respectively. Clearly, nitrous oxide has the largest contribution to GHG compared to other major emission inputs during the growing stage.<a name="p7"></a> N-related emissions come from various sources including direct and indirect N emissions, whereby the use of synthetic fertilizer may directly enhance the concentration of nitrogen in soil leading to the release of nitrous oxide through the soil nitrogen cycle prosesses, i.e. nitrification and denitrification (<a class="elsevierStyleCrossRef" href="#bib0100">Kusin <span class="elsevierStyleItalic">et al.,</span> 2014</a>). Notwithstanding this, N<span class="elsevierStyleInf">2</span>O emissions in the estate (i.e. 19.11-22.17 kg N<span class="elsevierStyleInf">2</span>O-N/ ha) are in agreement with the values reported by <a class="elsevierStyleCrossRef" href="#bib0135">Schmidt (2007)</a> for Malaysian oil palm plantations in general. On the other hand, the resulting CO<span class="elsevierStyleInf">2</span>-eq emission (i.e., 1052.26-1209.51 kg of CO<span class="elsevierStyleInf">2</span>-eq/ha) is far below the reported values elsewhere (e.g. <a class="elsevierStyleCrossRef" href="#bib0040">Germer and Sauerborn, 2008</a>; <a class="elsevierStyleCrossRef" href="#bib0035">Fargione <span class="elsevierStyleItalic">et al.,</span> 2008</a>; <a class="elsevierStyleCrossRef" href="#bib0155">Wicke <span class="elsevierStyleItalic">et al.,</span> 2008</a>; <a class="elsevierStyleCrossRef" href="#bib0095">Koh <span class="elsevierStyleItalic">et al.,</span> 2011</a>; <a class="elsevierStyleCrossRef" href="#bib0125">Page <span class="elsevierStyleItalic">et al.,</span> 2011</a>, among others). <a class="elsevierStyleCrossRef" href="#bib0010">Brinkmann Consultancy (2009)</a> estimated that the GHG emissions related to the use of fertilizers of between 1000-1500 kg CO<span class="elsevierStyleInf">2</span>-eq. ha<span class="elsevierStyleSup">–1</span> yr<span class="elsevierStyleSup">–1</span>.</p><elsevierMultimedia ident="fig0025"></elsevierMultimedia></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleLabel">4</span><span class="elsevierStyleSectionTitle" id="sect0045">Conclusions</span><p id="par0105" class="elsevierStylePara elsevierViewall">The growing stage is considered an important phase throughout the life cycle of palm oil production. This paper has highlighted the significant contribution of this stage, particularly from the use of synthetic fertilizer, to the emission of GHGs. In addition, the impact from land use change on the oil palm plantation development has also been assessed. The findings from this study are twofold:The transformation from a rubber plantation into an oil palm plantation slightly decreases the carbon stocks of the soil (and hence positive carbon emissions).</p><p id="par0110" class="elsevierStylePara elsevierViewall">NO<span class="elsevierStyleInf">2</span> is the largest contributor of GHGs during the plantation stage but the amount is within the estimated values for a Malaysian oil palm plantation</p><p id="par0115" class="elsevierStylePara elsevierViewall">Regarding these findings, it is noted that the use of nitrogen fertilizers may be a significant contributor to the emission of GHGs and the loss of carbon content from the plantation during the establishment of the oil palm crop. Therefore, it is likely that the application of nitrogen fertilizer may increase carbon emissions from the conversion of a rubber plantation to an oil palm plantation. However, the emission of CO<span class="elsevierStyleInf">2</span>-eq in the estate is still low compared to some other reported values elsewhere.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:9 [ 0 => array:3 [ "identificador" => "xres816068" "titulo" => "Resumen" "secciones" => array:1 [ 0 => array:1 [ "identificador" => "abst0005" ] ] ] 1 => array:3 [ "identificador" => "xres816069" "titulo" => "Abstract" "secciones" => array:1 [ 0 => array:1 [ "identificador" => "abst0010" ] ] ] 2 => array:2 [ "identificador" => "xpalclavsec813292" "titulo" => "Keywords" ] 3 => array:2 [ "identificador" => "sec0005" "titulo" => "Introduction" ] 4 => array:3 [ "identificador" => "sec0010" "titulo" => "Materials and methods" "secciones" => array:2 [ 0 => array:2 [ "identificador" => "sec0015" "titulo" => "Study site and data" ] 1 => array:2 [ "identificador" => "sec0020" "titulo" => "Estimation of GHG emissions and carbon stock changes" ] ] ] 5 => array:2 [ "identificador" => "sec0025" "titulo" => "Results and discussion" ] 6 => array:2 [ "identificador" => "sec0030" "titulo" => "Conclusions" ] 7 => array:2 [ "identificador" => "xack273899" "titulo" => "Acknowledgments" ] 8 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2014-04-27" "fechaAceptado" => "2015-07-16" "PalabrasClave" => array:1 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec813292" "palabras" => array:6 [ 0 => "Carbon stock changes" 1 => "global warming" 2 => "greenhouse gas emission" 3 => "nitrous oxide" 4 => "nitrogen fertilizer" 5 => "oil palm plantation" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "es" => array:2 [ "titulo" => "Resumen" "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Se estudian las emisiones de gases de efecto invernadero relacionadas con el cambio de uso del suelo en una plantación de palma de aceite espescífica. Se analizaron las emisiones de óxido de nitrógeno (N<span class="elsevierStyleInf">2</span>O) procedentes de la aplicación de fertilizantes nitrogenados durante la etapa de cultivo en palmeras de diferentes edades dentro de la plantación. La emisión de N<span class="elsevierStyleInf">2</span>O varía de 19.11 a 22.17 kg de N<span class="elsevierStyleInf">2</span>O-N/ha, lo que resulta en la emisión de 1052.26-1209.51 kg de CO<span class="elsevierStyleInf">2</span>-eq/ha. Sin embargo, no se encontró una relación evidente entre las emisiones de N<span class="elsevierStyleInf">2</span>O o CO<span class="elsevierStyleInf">2</span>-eq y la edad de las palmeras. Por otra parte, también se evaluó el impacto del cambio de uso del suelo en el desarrollo de la plantación mediante la evaluación de variaciones en las existencias de carbono dentro de la plantación. La conversión de finca cauchera a plantación de palma de aceite libera el contenido de carbono en el suelo (i.e., produce emisión de carbono), pero dicho fenómeno está previsto en la literatura. En conjunto, las emisiones relacionadas con el fertilizante y las vinculadas con el combustible durante la etapa de cultivo contribuyen con alrededor de 79 y 21%, respectivamente, de la emisión total de gases de efecto invernadero de la plantación. Por lo tanto es probable que la aplicación de fertilizantes nitrogenados incremente las emisiones resultantes de la transformación de finca cauchera a plantación de palma de aceite, pero los valores se encuentran dentro de los límites estimados para una plantación de palma de aceite en Malasia.</p></span>" ] "en" => array:2 [ "titulo" => "Abstract" "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">The emissions of greenhouse gases (GHGs) in an oil palm plantation associated with land use change have been evaluated on a site-specific basis. Nitrous oxide (N<span class="elsevierStyleInf">2</span>O) emissions from the application of nitrogen fertilizers during the growth stages of the palm oil were analyzed for palms of different ages within the plantation. The N<span class="elsevierStyleInf">2</span>O release ranges between 19.11-22.17 kg of N<span class="elsevierStyleInf">2</span>O-N/ha, resulting in the emission of 1052.26-1209.51 kg of CO<span class="elsevierStyleInf">2</span>-eq/ha. However, there is no clear relationship between the emissions of N<span class="elsevierStyleInf">2</span>O or CO<span class="elsevierStyleInf">2</span>-eq and the age of the oil palms. On the other hand, the impact from land use change for the development of the site was also evaluated by assessing the emissions from carbon stock changes within the plantation. The transformation<a name="p2"></a> of a rubber estate into an oil palm plantation loses the soil carbon content (i.e., release of carbon emissions). However, this phenomenon has been anticipated in literature. Overall, fertilizer-related emissions and fuel emissions during the growth stages contribute to about 79 and 21%, respectively, of the total GHG emissions from the plantation. Therefore, it is likely that the application of nitrogen fertilizer may increase the existing carbon emission from the conversion of rubber to oil palm plantation, but the values are within the estimated for a Malaysian oil palm plantation.</p></span>" ] ] "multimedia" => array:10 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1196 "Ancho" => 1568 "Tamanyo" => 309499 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Kempas Estate. (a) Location of. (b) Distribution: 1, mature palm block (> 20 yrs.; 2, mature palms (15-20 yrs.); 3, mature palms (10-15 yrs.); 4, immature palms (< 5 yrs.).</p>" ] ] 1 => array:7 [ "identificador" => "fig0010" "etiqueta" => "Fig. 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1102 "Ancho" => 940 "Tamanyo" => 57256 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Emissions from carbon stock changes. (a) <span class="elsevierStyleItalic">t</span> CO<span class="elsevierStyleInf">2</span>-eq/ha, (b) kg CO<span class="elsevierStyleInf">2</span>-eq/<span class="elsevierStyleItalic">MJ</span> palm oil.</p>" ] ] 2 => array:7 [ "identificador" => "fig0015" "etiqueta" => "Fig. 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 664 "Ancho" => 934 "Tamanyo" => 110693 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Nitrous oxide and CO<span class="elsevierStyleInf">2</span>-eq emissions from 1986-2009.</p>" ] ] 3 => array:7 [ "identificador" => "fig0020" "etiqueta" => "Fig. 4" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr4.jpeg" "Alto" => 1705 "Ancho" => 943 "Tamanyo" => 94741 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Amount of (a) N-fertilizer applied (kg); (b) nitrous oxide emission (kg N<span class="elsevierStyleInf">2</span>O-N/ha); and (c) CO<span class="elsevierStyleInf">2</span>-eq emission (kg CO<span class="elsevierStyleInf">2</span>-eq/ha) in Kempas Estate, according to the age of oil palms.</p>" ] ] 4 => array:7 [ "identificador" => "fig0025" "etiqueta" => "Fig. 5" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr5.jpeg" "Alto" => 519 "Ancho" => 944 "Tamanyo" => 37866 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">GHG emissions during tha plantation stage of oil palm production.</p>" ] ] 5 => array:7 [ "identificador" => "tbl0005" "etiqueta" => "Table I" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head " rowspan="2" align="left" valign="top" scope="col" style="border-bottom: 2px solid black"></th><th class="td" title="table-head " colspan="3" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Age of palm (year)</th></tr><tr title="table-row"><th class="td" title="table-head " align="center" valign="top" scope="col" style="border-bottom: 2px solid black">< 5 (immature) \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="center" valign="top" scope="col" style="border-bottom: 2px solid black">5-20 (mature) \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="center" valign="top" scope="col" style="border-bottom: 2px solid black">20 (mature) \t\t\t\t\t\t\n \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry " align="left" valign="top">N-fertilizer applied (kg N/ha) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">108 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">134 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">118 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="left" valign="top">N<span class="elsevierStyleInf">2</span>O emissions (kg N<span class="elsevierStyleInf">2</span>O-N/ha) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">22.17 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">19.31 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">19.11 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry " align="left" valign="top">CO<span class="elsevierStyleInf">2</span>-eq (kg CO<span class="elsevierStyleInf">2</span>-eq/ha) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1123.15 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1209.51 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1052.26 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab1371559.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Amount of N-fertilizer applied and calculated N<span class="elsevierStyleInf">2</span>O and CO<span class="elsevierStyleInf">2</span>-eq emissions according to the age of the oil palm (immture and mature).</p>" ] ] 6 => array:6 [ "identificador" => "eq0005" "etiqueta" => "(1)" "tipo" => "MULTIMEDIAFORMULA" "mostrarFloat" => false "mostrarDisplay" => true "Formula" => array:5 [ "Matematica" => "kgN2O-N/ha = (FSN+FON+FCR+FSOM)×EF1+FOS× EF2" "Fichero" => "STRIPIN_si1.jpeg" "Tamanyo" => 3902 "Alto" => 15 "Ancho" => 453 ] ] 7 => array:5 [ "identificador" => "eq0010" "tipo" => "MULTIMEDIAFORMULA" "mostrarFloat" => false "mostrarDisplay" => true "Formula" => array:5 [ "Matematica" => "CO2eq=FSN×FE1 44/28 GWPN2O/1000" "Fichero" => "STRIPIN_si2.jpeg" "Tamanyo" => 2904 "Alto" => 16 "Ancho" => 331 ] ] 8 => array:5 [ "identificador" => "eq0015" "tipo" => "MULTIMEDIAFORMULA" "mostrarFloat" => false "mostrarDisplay" => true "Formula" => array:5 [ "Matematica" => "CS=SOC+Cveg=SOC×FLU×FMG×FI+CBM+CDOM" "Fichero" => "STRIPIN_si3.jpeg" "Tamanyo" => 3881 "Alto" => 38 "Ancho" => 325 ] ] 9 => array:5 [ "identificador" => "eq0020" "tipo" => "MULTIMEDIAFORMULA" "mostrarFloat" => false "mostrarDisplay" => true "Formula" => array:5 [ "Matematica" => "CO2-eq = ΔCS × 44/12 × 1/20 × 1/P=CSR−CSA × 44/12 × 1/20 × 1/P" "Fichero" => "STRIPIN_si4.jpeg" "Tamanyo" => 4445 "Alto" => 38 "Ancho" => 299 ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0005" "bibliografiaReferencia" => array:31 [ 0 => array:3 [ "identificador" => "bib0005" "etiqueta" => "Abdullah, 2013" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "The estimation of carbon dioxide emissions from transportation activities in the palm oil plantation" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "F.I. Abdullah" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:4 [ "titulo" => "B. Sc. Thesis" "fecha" => "2013" "editorial" => "Universiti Putra" "editorialLocalizacion" => "Malaysia" ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib0010" "etiqueta" => "Brinkman Consultancy, 2009" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Greenhouse gas emissions from palm oil production" "autores" => array:1 [ 0 => array:2 [ "colaboracion" => "Brinkman Consultancy" "etal" => false ] ] ] ] "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:4 [ "titulo" => "Literature review and proposals from the RSPO Working G Group on greenhouse gases. Final report, Brinkmann Consultancy" "paginaInicial" => "57" "conferencia" => "The Netherlands" "serieFecha" => "2009" ] ] ] ] ] ] 2 => array:3 [ "identificador" => "bib0015" "etiqueta" => "Castanheira et al., 2014" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Greenhouse gas intensity of palm oil produced in Colombia addressing alternative land use change and fertilization scenarios" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "E.G. Castanheira" 1 => "H. Acevedo" 2 => "F. Freire" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Appl. Energ" "fecha" => "2014" "volumen" => "114" "paginaInicial" => "958" "paginaFinal" => "967" ] ] ] ] ] ] 3 => array:3 [ "identificador" => "bib0020" "etiqueta" => "Chase and Henson, 2010" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "A detailed greenhouse gas budget for palm oil production" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "L.D.C. Chase" 1 => "I.E. Henson" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Int. J. Agric. Sustain." "fecha" => "2010" "volumen" => "8" "paginaInicial" => "199" "paginaFinal" => "214" ] ] ] ] ] ] 4 => array:3 [ "identificador" => "bib0025" "etiqueta" => "Corley and Tinker, 2003" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "The oil palm" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "R.H.V. Corley" 1 => "P.B. Tinker" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:5 [ "edicion" => "4th" "fecha" => "2003" "paginaInicial" => "28" "editorial" => "Blackwell Science" "editorialLocalizacion" => "Oxford" ] ] ] ] ] ] 5 => array:3 [ "identificador" => "bib0030" "etiqueta" => "De Datta, 1995" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Nitrogen transformation in wetland rice ecosystems" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "S.K. De Datta" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Fert. Res." "fecha" => "1995" "volumen" => "42" "paginaInicial" => "193" "paginaFinal" => "203" ] ] ] ] ] ] 6 => array:3 [ "identificador" => "bib0035" "etiqueta" => "Fargione et al., 2008" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Land clearing and the biofuel carbon debt" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "J. Fargione" 1 => "J. Hill" 2 => "D. Tilman" 3 => "S. Polasky" 4 => "P. Hawthorne" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1126/science.1152747" "Revista" => array:6 [ "tituloSerie" => "Science" "fecha" => "2008" "volumen" => "319" "paginaInicial" => "1235" "paginaFinal" => "1238" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18258862" "web" => "Medline" ] ] ] ] ] ] ] ] 7 => array:3 [ "identificador" => "bib0040" "etiqueta" => "Germer and Sauerborn, 2008" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Estimation of the impact of oil palm plantation establishment on greenhouse gas balance" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "J. Germer" 1 => "J. Sauerborn" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Environ. Dev. Sustain." "fecha" => "2008" "volumen" => "10" "paginaInicial" => "697" "paginaFinal" => "716" ] ] ] ] ] ] 8 => array:3 [ "identificador" => "bib0045" "etiqueta" => "Giltrap et al., 2014" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Understanding and analysing spatial variability of nitrous oxide emission from a grazed pasture" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "D.L. Giltrap" 1 => "P. Berben" 2 => "T. Palmada" 3 => "S. Saggar" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Agr. Ecosyst. Environ" "fecha" => "2014" "volumen" => "186" "paginaInicial" => "1" "paginaFinal" => "10" ] ] ] ] ] ] 9 => array:3 [ "identificador" => "bib0050" "etiqueta" => "Greef, 1994" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Productivity of maize (Zea mays L.) in relation to morphological and physiological characteristics under varying amounts of nitrogen supply" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "J.M. Greef" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "J. Agron. Crop Sci." "fecha" => "1994" "volumen" => "172" "paginaInicial" => "317" "paginaFinal" => "326" ] ] ] ] ] ] 10 => array:3 [ "identificador" => "bib0055" "etiqueta" => "Hansen et al., 2014" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Carbon balance impacts of land use changes related to the life cycle of Malaysian palm oil-derived biodiesel" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "S.B. Hansen" 1 => "S.I. Olsen" 2 => "Z. Ujang" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Int. J. Life Cycle Ass." "fecha" => "2014" "volumen" => "19" "paginaInicial" => "558" "paginaFinal" => "566" ] ] ] ] ] ] 11 => array:3 [ "identificador" => "bib0060" "etiqueta" => "Henson, 2004" "referencia" => array:1 [ 0 => array:3 [ "comentario" => "<a name="p8"></a>" "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Modelling carbon sequestration and emissions related to oil palm cultivation and associated land use change in Malaysia. MPOB Technology No. 27" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "I.E. Henson" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:4 [ "titulo" => "Malaysian Palm Oil Board" "fecha" => "2004" "editorial" => "Kajang" "editorialLocalizacion" => "Malaysia" ] ] ] ] ] ] 12 => array:3 [ "identificador" => "bib0065" "etiqueta" => "Henson, 2005" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "An assessment of changes in biomass carbon stocks in tree crops and forests in Malaysia" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "I.E. Henson" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "J. Trop. For. Sci." "fecha" => "2005" "volumen" => "17" "paginaInicial" => "279" "paginaFinal" => "296" ] ] ] ] ] ] 13 => array:3 [ "identificador" => "bib0070" "etiqueta" => "Hewitta et al., 2009" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Nitrogen management is essential to prevent tropical oil palm plantations from causing ground level ozone pollution" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:29 [ 0 => "C.N. Hewitta" 1 => "A. R MacKenziea" 2 => "P. Di Carlob" 3 => "C.F. Di Marco" 4 => "J.R. Dorseyd" 5 => "M. Evanse" 6 => "D. Fowlerc" 7 => "M.W. Gallagherd" 8 => "J.R. Hopkins" 9 => "C.E. Jones" 10 => "B. Langforda" 11 => "J.D. Leef" 12 => "A.C. Lewis" 13 => "S.F. Limg" 14 => "J. McQuaide" 15 => "P. Misztalc" 16 => "S.J. Mollerf" 17 => "P.S. Monksh" 18 => "E. Nemitzc" 19 => "D.E. Orami" 20 => "S.M. Owenc" 21 => "G.J. Phillipsc" 22 => "T.A.M. Pugha" 23 => "J.A. Pylej" 24 => "C.E. Reevesi" 25 => "J. Ryderc" 26 => "J. Siongc" 27 => "U. Skibac" 28 => "J. Stewarti" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Sustain. Sci" "fecha" => "2009" "volumen" => "106" "paginaInicial" => "18447" "paginaFinal" => "18451" ] ] ] ] ] ] 14 => array:3 [ "identificador" => "bib0075" "etiqueta" => "IPCC, 2006" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "IPCC Guidelines for National Greenhouse Gas Inventories" "autores" => array:1 [ 0 => array:2 [ "colaboracion" => "IPCC" "etal" => false ] ] ] ] "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:2 [ "titulo" => "Agriculture, forestry and other land use. Prepared by the National Greenhouse Gas Inventories Programme." "serieFecha" => "2006" ] ] ] ] ] ] 15 => array:3 [ "identificador" => "bib0080" "etiqueta" => "IPCC, 2007" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Fourth assessment report on climate change 2007" "autores" => array:1 [ 0 => array:2 [ "colaboracion" => "IPCC" "etal" => false ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:4 [ "titulo" => "Contribution of Working G Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change" "fecha" => "2007" "editorial" => "Cambridge University Press" "editorialLocalizacion" => "Cambridge, United Kingdom and New York, USA" ] ] ] ] ] ] 16 => array:3 [ "identificador" => "bib0085" "etiqueta" => "Millar et al., 2010" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Nitrogen fertilizer management for nitrous oxide (N<span class="elsevierStyleInf">2</span>O) mitigation in intensive corn (maize) production: An emissions reduction protocol for U.S Midwest agriculture" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "N. Millar" 1 => "G.P. Robertson" 2 => "P.R. Grace" 3 => "R.J. Gehl" 4 => "J.P. Hoben" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Mitigation Adaptation Strategy of Global Change" "fecha" => "2010" "volumen" => "15" "paginaInicial" => "185" "paginaFinal" => "204" ] ] ] ] ] ] 17 => array:3 [ "identificador" => "bib0090" "etiqueta" => "Klaarenbeeksingel, 2009" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Greenhouse gas emissions from palm oil production" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "F.W. Klaarenbeeksingel" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:3 [ "fecha" => "2009" "editorial" => "Brinkmann Consultancy, Hoevelaken" "editorialLocalizacion" => "The Netherlands" ] ] ] ] ] ] 18 => array:3 [ "identificador" => "bib0095" "etiqueta" => "Koh et al., 2011" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Remotely sensed evidence of tropical peatland conversion to oil palm" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "L.P. Koh" 1 => "J. Miettinen" 2 => "S.C. Liew" 3 => "J. Ghazoul" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "P. Natl. Acad. Sci. USA" "fecha" => "2011" "volumen" => "108" "paginaInicial" => "5127" "paginaFinal" => "5132" ] ] ] ] ] ] 19 => array:3 [ "identificador" => "bib0100" "etiqueta" => "Kusin et al., 2014" "referencia" => array:1 [ 0 => array:1 [ "referenciaCompleta" => "Kusin F. M., N.I. M. Akhir, F. Mohamat-Yusuff and M. Awang, 2014. Nitrous oxide emission from nitrogen fertilizer application in oil palm plantation of different stages. <span class="elsevierStyleItalic">Int. J. Global Warming</span>, in press." ] ] ] 20 => array:3 [ "identificador" => "bib0105" "etiqueta" => "Lai, 2014" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Soil carbon sequestration in natural and managed tropical forest ecosystems" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "R. Lai" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Journal of Sustainable Forestry" "fecha" => "2014" "volumen" => "21" "paginaInicial" => "381" "paginaFinal" => "388" ] ] ] ] ] ] 21 => array:3 [ "identificador" => "bib0110" "etiqueta" => "Mejan, 2013" "referencia" => array:1 [ 0 => array:1 [ "referenciaCompleta" => "Mejan M. A., 2013. Comparison of carbon and organic matter content between highly degraded area and logged over forest for oil palm plantation. B. Sc. Thesis, Universiti Putra Malaysia." ] ] ] 22 => array:3 [ "identificador" => "bib0115" "etiqueta" => "Mosquera et al., 2007" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Precise soil management as a tool to reduce CH<span class="elsevierStyleInf">4</span> and N<span class="elsevierStyleInf">2</span>O emissions from agricultural soils. Report 28" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "J. Mosquera" 1 => "J.M.G. Hol" 2 => "J. Dolfing" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:4 [ "fecha" => "2007" "paginaInicial" => "42" "editorial" => "Animal Sciences Group" "editorialLocalizacion" => "Wageningen" ] ] ] ] ] ] 23 => array:3 [ "identificador" => "bib0120" "etiqueta" => "MPOB, 2001" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Malaysian oil palm statistics 2000" "autores" => array:1 [ 0 => array:2 [ "colaboracion" => "MPOB." "etal" => false ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:4 [ "edicion" => "20th ed." "fecha" => "2001" "paginaInicial" => "132" "editorial" => "Malaysia Palm Oil Board" ] ] ] ] ] ] 24 => array:3 [ "identificador" => "bib0125" "etiqueta" => "Page et al., 2011" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Review of peat surface greenhouse gas emissions from oil palm plantations in Southeast Asia" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:6 [ 0 => "S.E. Page" 1 => "R. Morrison" 2 => "C. Malins" 3 => "A. Hooijer" 4 => "J.O. Rieley" 5 => "J. Jauhiainen" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Libro" => array:4 [ "fecha" => "2011" "paginaInicial" => "80" "editorial" => "International Council on Clean Transportation" "editorialLocalizacion" => "Washington" ] ] ] ] ] ] 25 => array:3 [ "identificador" => "bib0130" "etiqueta" => "Sawan et al., 2001" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Effect of nitrogen and zinc fertilization and plant growth retardants on cottonseed, protein, oil yields, and oil properties" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "Z.M. Sawan" 1 => "S.A. Hafez" 2 => "A.E. Basyony" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Journal of American Oil Chemists ’Society" "fecha" => "2001" "volumen" => "78" "paginaInicial" => "1087" "paginaFinal" => "1092" ] ] ] ] ] ] 26 => array:3 [ "identificador" => "bib0135" "etiqueta" => "Schmidt, 2007" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Life cycle assessment of rapeseed oil and palm oil. Ph. D. Thesis, Aalborg University, DenmarkSchmidt J. H. 2010 Comparative life cycle assessment of rapeseed oil and palm oil" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "J.H. Schmidt" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Int. J. Life Cycle Ass." "fecha" => "2007" "volumen" => "15" "paginaInicial" => "183" "paginaFinal" => "197" ] ] ] ] ] ] 27 => array:3 [ "identificador" => "bib0140" "etiqueta" => "Siangjaeo et al., 2011" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Implications of land use change on the life cycle greenhouse gas emissions from palm biodiesel production in Thailand" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "S. Siangjaeo" 1 => "S.H. Gheewala" 2 => "K. Unnanon" 3 => "A. Chidthaisong" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Energy for Sustainable Development" "fecha" => "2011" "volumen" => "15" "paginaInicial" => "1" "paginaFinal" => "7" ] ] ] ] ] ] 28 => array:3 [ "identificador" => "bib0145" "etiqueta" => "Sugiyama et al., 1984" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Partitioning of nitrogen among ribulose-1, 5-bisphosphate carboxylase/oxygenase, phosphoenolpyruvate carboxylase, and pyruvate orthophosphate dikinase as related to biomass productivity in maize seedlings" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "T. Sugiyama" 1 => "M. Mizuno" 2 => "M. Hayashi" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:6 [ "tituloSerie" => "Plant Physiol" "fecha" => "1984" "volumen" => "75" "paginaInicial" => "665" "paginaFinal" => "669" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/16663684" "web" => "Medline" ] ] ] ] ] ] ] ] 29 => array:3 [ "identificador" => "bib0150" "etiqueta" => "Vandermeer et al., 2009" "referencia" => array:1 [ 0 => array:1 [ "host" => array:1 [ 0 => array:1 [ "LibroEditado" => array:2 [ "titulo" => "Effects of industrial agriculture on global warming and the potential of small-scale agroecological techniques to reverse those effects. A report to Via Campesina by The New World Agriculture and Ecology Group" "serieFecha" => "2009" ] ] ] ] ] ] 30 => array:3 [ "identificador" => "bib0155" "etiqueta" => "Wicke et al., 2008" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Different palm oil production systems for energy purposes and their greenhouse gas implications" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "B. Wicke" 1 => "V. Dornburg" 2 => "M. Junginger" 3 => "A. Faaij" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "Biomass and Bioenergy" "fecha" => "2008" "volumen" => "32" "paginaInicial" => "1322" "paginaFinal" => "1337" ] ] ] ] ] ] ] ] ] ] "agradecimientos" => array:1 [ 0 => array:4 [ "identificador" => "xack273899" "titulo" => "Acknowledgments" "texto" => "<p id="par0125" class="elsevierStylePara elsevierViewall">This study was funded through the Long-Term Research Grant Scheme (LRGS) of the Ministry of Higher Education Malaysia (MOHE), project number LRGS/6375401. The second author wishes to thank University Putra Malaysia for the support from Graduate Research Fellowship Scholarship awarded. Data from Kempas Estate, Sime Darby Plantation Malaysia is greatly appreciated.</p>" "vista" => "all" ] ] ] "idiomaDefecto" => "en" "url" => "/01876236/0000002800000004/v1_201703180150/S0187623617300085/v1_201703180150/en/main.assets" "Apartado" => null "PDF" => "https://static.elsevier.es/multimedia/01876236/0000002800000004/v1_201703180150/S0187623617300085/v1_201703180150/en/main.pdf?idApp=UINPBA00004N&text.app=https://www.elsevier.es/" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0187623617300085?idApp=UINPBA00004N" ]
| Year/Month | Html | Total | |
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| 2024 November | 10 | 0 | 10 |
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| 2020 July | 14 | 4 | 18 |
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