<?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>S0187-57792019000100069</article-id>
<article-id pub-id-type="doi">10.28940/tl.v37i1.412</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Mediciones de metano y bióxido de carbono usando la técnica de covarianza de vórtices en ganado lechero semiestabuldado en Sonora, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Methane and carbon dioxide measurements using the eddie covariance technique in semi-stabled dairy cattle in Sonora, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[Julio Cesar]]></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[Watts]]></surname>
<given-names><![CDATA[Christopher]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lizárraga Celaya]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yépez González]]></surname>
<given-names><![CDATA[Enrico]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez Ferrer]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castellanos Villegas]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hinojo Hinojo]]></surname>
<given-names><![CDATA[Cesar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Macías Vázquez]]></surname>
<given-names><![CDATA[Carlos Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sonora  ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico de Sonora  ]]></institution>
<addr-line><![CDATA[Ciudad Obregón Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,El Colegio de la Frontera Sur  ]]></institution>
<addr-line><![CDATA[San Cristóbal de las Casas Chiapas]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<volume>37</volume>
<numero>1</numero>
<fpage>69</fpage>
<lpage>80</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792019000100069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792019000100069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792019000100069&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La agricultura (incluyendo ganadería) es considerada como una de las principales fuentes de gases efecto invernadero. Por lo cual, el monitoreo de los gases efecto invernadero (GEI) en dicha actividad es necesario para lo cual existen diversas metodologías. La técnica de covarianza de vórtices es una de ellas permitiendo el análisis de GEI de manera continua. Acuerdo con esto, se planteó la instalación y evaluación de un sistema GHG-2 para el monitoreo de CH4 y CO2 en un hato lechero en un sistema semi-estabulado en Sonora. Los resultados muestraron que el GHG-2 permite evaluar el comportamiento continuo de los flujos CH4 y CO2 observándose picos de ambos gases cuando el ganado estuvo presente. Asimismo, permitió corroborar la existencia de una alta correlación relación entre ambos GEI (CH4:CO2), similares a estudios previos, lo que permite utilizar esta razón para estimar las emisiones de metano en forma indirecta a través de balances energéticos para calcular CO2. Una de las limitaciones de esta técnica en sistemas confinados o semiconfinados es la presencia de material particulado en la atmósfera que obliga a una supervisión y mantenimiento frecuente; así como el alto consumo de energía, lo cual obliga a considerar en el proyecto un adecuado suministro de fluido eléctrico mediante paneles solares y acumuladores, si no se cuenta con una fuente continua de electricidad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary Agriculture (including livestock) is considered one of the main sources of greenhouse gases. Monitoring greenhouse gases (GHG) is necessary in this activity, and there are several methodologies. One of these methodologies is the eddie covariance technique, which can analyze GHG in a continuous manner. Accordingly, the installation and evaluation of a GHG-2 system was proposed for monitoring CH4 and CO2 in a dairy herd in a semi-confined system in Sonora. The results show that the GHG-2 can evaluate the continuous behavior of the CH4 and CO2 emissions, observing peaks of both gases when the cattle were present. It also corroborated the existence of a good relationship between both GHG (CH4:CO2), similar to previous studies, where this ratio was used to estimate methane emissions indirectly through energy balances to calculate CO2. One of the limitations of this technique in confined or semi-confined systems is the presence of particulate matter in the atmosphere that requires frequent monitoring and maintenance of the equipment, as well as the high consumption of energy, which forces us to consider solar panels and batteries to supply an adequate flow of electricity if another continuous source of electricity is not available.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ganadería]]></kwd>
<kwd lng="es"><![CDATA[GEI]]></kwd>
<kwd lng="es"><![CDATA[sistema GHG-2]]></kwd>
<kwd lng="es"><![CDATA[razón CH4:CO2]]></kwd>
<kwd lng="es"><![CDATA[material particulado]]></kwd>
<kwd lng="en"><![CDATA[livestock]]></kwd>
<kwd lng="en"><![CDATA[GHG]]></kwd>
<kwd lng="en"><![CDATA[GHG-2 system]]></kwd>
<kwd lng="en"><![CDATA[CH4:CO2 ratio]]></kwd>
<kwd lng="en"><![CDATA[particulate material]]></kwd>
</kwd-group>
</article-meta>
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