<?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>S0187-57792016000100083</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Emisiones de gases de efecto invernadero en sistemas agrícolas de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Greenhouse gas emissions in agricultural systems in Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saynes Santillán]]></surname>
<given-names><![CDATA[Vinisa]]></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[Alvarado Cárdenas]]></surname>
<given-names><![CDATA[Leonardo O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[ D. F.]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2016</year>
</pub-date>
<volume>34</volume>
<numero>1</numero>
<fpage>83</fpage>
<lpage>96</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792016000100083&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792016000100083&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792016000100083&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La agricultura es el sustento para la alimentación de una población mundial creciente. La agricultura es la cuarta causa de emisiones de GEI, y emite grandes cantidades de los llamados &#8220;gases que no son CO2&#8221; incluyendo al N2O y el CH4 con un poder de calentamiento 265 y 28 veces, respectivamente, mayor en comparación con el CO2. En México la información de las emisiones de GEI se reporta en diversos foros y desde diferentes perspectivas. En este trabajo se recopiló información de las emisiones de GEI de las Comunicaciones Nacionales y el Primer Informe Bienal, de publicaciones arbitradas por pares y de la literatura gris. Las emisiones del sector agrícola reportadas en las diferentes Comunicaciones presentan inconsistencias debido a factores como falta de información y de acceso a esta en las primeras dos Comunicaciones y a cuestiones de tipo metodológico en las Comunicaciones subsecuentes. De acuerdo con las estimaciones más actuales (Informe Bienal), las actividades agropecuarias son la tercera causa de generación de emisiones de GEI con una contribución del 12% a las emisiones nacionales. Dentro de esta categoría la mayor parte de las emisiones se generan por la fermentación entérica, el manejo del estiércol y por el uso de fertilizantes en los suelos agrícolas. Los principales retos para mejorar las estimaciones y reducir su incertidumbre es la generación de factores de emisión nacionales para lo cual es esencial contar con mayor información de las fuentes clave. En este trabajo se encontró que existe información relevante que sería de utilidad pero se encuentra dispersa por lo que falta síntesis y organización de la información sobre todo de la que se encuentra en la literatura gris.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Agriculture is the food source to feed an increasing global population. Agriculture is the fourth cause of global GHG emissions with the non-CO2 gases among them, including N2O and CH4. These gases have a warming potential of 265 and 28 for N2O and CH4, respectively. In Mexico GHG emission information has been reported in several communications and from different perspectives. In this paper we collected the available GHG information reported in National Communications and the First Biennial Report, in peer review papers and &#8220;grey&#8221; literature. Agriculture emissions reported in National Communications showed inconsistencies due to factors such as lack of information, access to information in the case of the First and Second Communications. In the case of the subsequent reports inconsistencies were associated with methodological issues. According to the updated national GHG estimations presented in the Biennial Report, agricultural activities are the third cause of GHG emissions accounting for the 12% on national emissions. Within the Agriculture category enteric fermentation, manure management and synthetic use of nitrogen fertilizers are causing the majority of GHG emissions. The main challenges to improve the estimations of GHG emissions and reduce its uncertainty is the generation of detailed national emissions factors to which it is essential to obtain more and better information of the key sources. In this investigation we found there is relevant information that would be useful but it is dispersed. Therefore it is necessary the synthesis and systematization of the information, particularly the one found in the &#8220;grey&#8221; literature.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[sector agrícola]]></kwd>
<kwd lng="es"><![CDATA[inventarios de GEI]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="en"><![CDATA[agricultural sector]]></kwd>
<kwd lng="en"><![CDATA[GHG inventories]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
</kwd-group>
</article-meta>
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