<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792016000300357</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Desempeño del modelo Rothc-26.3 a nivel de parcela en México]]></article-title>
<article-title xml:lang="en"><![CDATA[Performance of the Rothc-26.3 model at the plot level in Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Molina]]></surname>
<given-names><![CDATA[Lucila]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Etchevers Barra]]></surname>
<given-names><![CDATA[Jorge D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paz Pellat]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrillo Anzures]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acosta Mireles]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Báez Pérez]]></surname>
<given-names><![CDATA[Aurelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>34</volume>
<numero>3</numero>
<fpage>357</fpage>
<lpage>366</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792016000300357&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792016000300357&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792016000300357&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: De acuerdo con el Panel Intergubernamental sobre el Cambio Climático (PICC), deben reportarse los almacenes y cambios del carbono orgánico del suelo (COS) en el tiempo. El modelo RothC-26.3 (RothC) es uno de los más usados en el mundo para estudiar la dinámica del C en diferentes sistemas. Se evaluó el desempeño del RothC en la simulación de los cambios del COS, a nivel de parcela, en experimentos de corta duración. Se evaluaron nueve sitios y los sistemas: agrícola con residuos vegetales (A+R), agrícola sin residuos (A-R), forestales (F), praderas (PR) y agostaderos (AGOS). Las parcelas experimentales se ubicaron en los estados de México, Tlaxcala, Michoacán, Guanajuato, Oaxaca, Jalisco y Nuevo León. El RothC se ejecutó (i) con el COSinicial, medido en cada punto de muestreo (*CIPUN) en parcelas de la Sierra Norte de Oaxaca y, (ii) con el COSinicial promedio medido por parcela (*CIPAR) en el resto de los sitios. Se midieron y estimaron los parámetros de entrada al modelo, como residuos vegetales y abonos orgánicos. El grado de asociación entre el COS medido y el simulado fue de 0.76 y hasta 1.0 en todos los sitios. La eficiencia del modelo (EF) varió entre 0.53 y 0.93, excepto en el Batán, donde se evaluaron sistemas de labranza (EF= &#8722;0.60). La r, en ambas formas de simulación, varió entre 0.63 y 0.97, excepto en AGOS; EF en los agrícolas fue de 0.48 a 0.84 y de 0.81 en F *CIPAR. La EF fue insatisfactoria obtenida para los AGOS (*CIPAR) y forestales y praderas (*CPUN). Considerando los resultados de los sitios y sistemas y, la forma de simulación *CIPAR, el modelo RothC se puede usar con buena aceptación para simular los cambios de COS a nivel de parcela en los sistemas agrícolas y forestales, mediana en praderas y baja en agostaderos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: To comply with the guidelines of the Intergovernment Panel on Climate Change (IPCC), it is necessary to report changes in soil organic carbon (SOC) stocks. The RothC-26.3 (RothC) model is one of the most used models worldwide to study C dynamics in different systems. This study evaluated the performance of RothC in simulating SOC stocks changes at the plot level in short-term experiments. Nine sites were assessed as well as five systems: agriculture with plant residues (A+R), agriculture without residues (A-R), forest (F), grassland (GL) and grazing commons (GRC). The experimental plots were located in the states of México, Tlaxcala, Michoacán, Guanajuato, Oaxaca, Jalisco and Nuevo León. RothC was run (i) with SOCinitial measured at each sampling point (*CIPUN) only in the plot in the Sierra Norte of Oaxaca and (ii) with average SOCinitial measured in each plot (*CIPAR) in the rest of the plots. The entry parameters of the model, as well as the plant residues and organic fertilizers, were measured and estimated. The degree of association r between measured and simulated SOC was in the range of 0.7 to 1.0 in all of the sites. Model efficiency (EF) was between 0.53 and 0.93, except at the Batán site where tillage systems were assessed. In the evaluation by system, in both forms of simulation, r was between 0.63 and 0.95, except in GRC. EF was 0.48 to 0.84 in A+R and A-R and 0.81 in F *CIPAR. The grazing commons are complex because of heterogeneity of vegetation, soil, climate variability and grazing. Considering the results in the study sites, RothC can be used acceptably in the simulation of SOC changes without modifying its internal parameters.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[residuos vegetales]]></kwd>
<kwd lng="es"><![CDATA[uso de suelo]]></kwd>
<kwd lng="es"><![CDATA[sistemas de cultivo]]></kwd>
<kwd lng="en"><![CDATA[plant residues]]></kwd>
<kwd lng="en"><![CDATA[land use]]></kwd>
<kwd lng="en"><![CDATA[cropping systems]]></kwd>
</kwd-group>
</article-meta>
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