<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342015000801929</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Eficiencia energética y económica del cultivo de maíz en la zona de amortiguamiento de la Reserva de la Biosfera "La Sepultura", Chiapas, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Energy and economic efficiency of maize in the buffer zone of the Biosphere Reserve "La Sepultura", Chiapas, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guevara-Hernández]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Larramendi]]></surname>
<given-names><![CDATA[Luis Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Ramos]]></surname>
<given-names><![CDATA[Manuel Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fonseca-Flores]]></surname>
<given-names><![CDATA[María de los Ángeles]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinto-Ruiz]]></surname>
<given-names><![CDATA[René]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Muro]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Chiapas Facultad de Ciencias Agronómicas ]]></institution>
<addr-line><![CDATA[Villaflores Chiapas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Red de Estudios para el Desarrollo Rural, A. C.  ]]></institution>
<addr-line><![CDATA[Villacorzo Chiapas]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,UNACH Maestría en Ciencias en Producción Agropecuaria Tropical ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto de Investigaciones Agropecuarias "Jorge Dimitrov"  ]]></institution>
<addr-line><![CDATA[Granma ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,INIFAP Campo Experimental Pabellón ]]></institution>
<addr-line><![CDATA[Pabellón de Arteaga Aguascalientes]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>6</volume>
<numero>8</numero>
<fpage>1929</fpage>
<lpage>1941</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342015000801929&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342015000801929&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342015000801929&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se estudió el balance energético, la capacidad de producción de proteína-energía, y la factibilidad económica de tres sistemas de producción de maíz: policultivo maíz intercalado con frijol (SPM-1), producción de maíz criollo (SPM-2) y producción de maíz mejorado (SPM-3), ubicados en el ejido California dentro de la Reserva de la Biosfera "La Sepultura" en el estado de Chiapas, México. Derivado de una detallada descripción de los sistemas productivos, del análisis de ingresos de energía al sistema, flujos de materia física e insumos utilizados para la producción (Meul et al., 2007) y del análisis de la eficiencia energética (Funes, 2009), se encontró que el sistema de producción de maíz criollo intercalado con frijol mostró la mayor eficiencia energética con 1.12 Mcal producida, en comparación a los sistemas de maíz criollo en monocultivo y maíz mejorado, los cuales tuvieron índices de eficiencia de 1.07 y 0.99, respectivamente. De igual forma, el SPM-1 mostró el mayor potencial energético y proteico, capaz de satisfacer los requerimientos de 9 y 23 personas ha-1 año-1, respectivamente. El mayor beneficio/costo correspondió al sistema de producción con variedades mejoradas SPM-3. Entre los factores energéticos y económicos que más encarecen la producción, está la alta dependencia de insumos agroquímicos y el empleo de mano de obra contratada.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Energy balance, production capacity of protein-energy and, economic feasibility of three maize production systems were studied: poly-culture maize intercropped with beans (SPM-1), production of landrace maize (SPM-2) and, production of improved maize (SPM-3), located in the ejido California within the Biosphere Reserve "La Sepultura" in the State of Chiapas, Mexico. Derived from a detailed description of production systems, analysis of energy inputs to the system, physical flows and inputs used to produce material (Meul et al., 2007) and analysis of energy efficiency (Funes, 2009) it was found that the production system of landrace maize intercropped with beans showed the highest energy efficiency with 1. 12 Mcal produced, compared to the systems of landrace maize in monoculture and improved maize, which had efficiency ratings of 1.07 and 0.99, respectively. Similarly, the SPM-1 showed the highest energy and protein, capable of meeting the requirements of9 and 23 individuals ha-1 year1, respectively potential. The biggest benefit/cost corresponded to the production system with improved varieties SPM-3. Among the energy and economic factors that increase the cost of production is high dependence on chemical inputs and the use of hired labour.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Zea mays]]></kwd>
<kwd lng="es"><![CDATA[alimentación humana]]></kwd>
<kwd lng="es"><![CDATA[balance energético]]></kwd>
<kwd lng="es"><![CDATA[sistemas de producción]]></kwd>
<kwd lng="en"><![CDATA[Zea mays]]></kwd>
<kwd lng="en"><![CDATA[food]]></kwd>
<kwd lng="en"><![CDATA[energy balance]]></kwd>
<kwd lng="en"><![CDATA[production systems]]></kwd>
</kwd-group>
</article-meta>
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