<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282016000300335</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Reducción de la metanogénesis ruminal in vitro con aceites vegetales de Thevetia peruviana y Persea americana]]></article-title>
<article-title xml:lang="en"><![CDATA[In vitro ruminal methanogenesis reduction with vegetable oils Thevetia peruviana and Persea americana]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orozco-Durán]]></surname>
<given-names><![CDATA[Karlos Edmundo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Camacho]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castelán-Ortega]]></surname>
<given-names><![CDATA[Octavio Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Márquez-Benavides]]></surname>
<given-names><![CDATA[Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Buenrostro-Delgado]]></surname>
<given-names><![CDATA[Otoniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kú-Vera]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Instituto de Investigaciones Agropecuarias y Forestales ]]></institution>
<addr-line><![CDATA[ Michoacán]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Yucatán Campus de Ciencias Biológicas y Agropecuarias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>3</volume>
<numero>9</numero>
<fpage>335</fpage>
<lpage>344</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282016000300335&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282016000300335&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282016000300335&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se evaluó el efecto de la adición de proporciones 0, 1, 2, 3, 4, 5 y 6 % de aceites de semillas de Thevetia peruviana (TP) y frutos de aguacate Persea americana (AG) en cultivos in vitro de fluido ruminal bovino sobre la producción de gas (PG), metano (CH4), la digestibilidad de materia seca (DIVMS) y fibra detergente neutra (DIVFDN). Se utilizó un modelo lineal de contrastes ortogonales para el análisis de datos. Se encontró efecto (p &lt; 0.0001) en la inclusión de ambos aceite sobre la PG a partir del 4 %, con una producción promedio de 220 cm3. En la producción de CH4, se encontró una disminución a partir del 3 % de inclusión de ambos aceites (p &lt; 0.0001), con efecto lineal y cuadrático al aumentar la dosis. La DIVMS del tratamiento testigo fue del 67.2 %, disminuyendo significativamente a partir de los niveles 4, 5 y 6 % de ambos aceites. La DIVFDN, mostró una tendencia similar, disminuyendo en ambos tratamientos de manera significativa a partir del 4 % de inclusión. Para todas las variables evaluadas se encontró un efecto del nivel de aceite, pero no se observó efecto del tipo de aceite. El nivel del 3 % de suplementación de aceites de TP y AG redujo la producción de CH4, sin afectar la producción de gas y digestibilidad del forraje, por lo que puede ser el nivel más apropiado para evaluar su potencial en condiciones in vivo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The effect of adding different proportions 0, 1, 2, 3, 4, 5 y 6 % of Thevetia peruviana (TP) and avocado fruit Persea americana (AG) seed oils, was evaluated over gas production (GP), methane (CH4) dry matter digestibility (IVDMD) and neutral detergent fiber digestibility (IVDNDF) in a cultured bovine rumen fluid system. For data analysis a lineal model of orthogonal contrasts was used. Finding an effect of both oils (P &lt; 0.001) over GP from 4 % inclusion, with an average production of 220 cm3. In the methane production, a decrease from 3 % inclusion was found in both treatments (P &lt; 0.0001), with a linear and quadratic effect when the oils doses were increased. The IVDMD of control treatment was 67.2 %, significantly decreasing from levels 4, 5 and 6 % in both treatments, IVDNDF showed a similar trend, declining significantly in both treatments from 4 % inclusion in both oils. For all the evaluated variables an effect of the inclusion level was found, but not an effect related to the type of oil. The 3 % of TP and AG oil supplementation reduces CH4 production without affecting gas production, either forage digestibility, so this level could be the more appropriate to evaluate its potential in vivo conditions.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ácidos grasos]]></kwd>
<kwd lng="es"><![CDATA[aguacate]]></kwd>
<kwd lng="es"><![CDATA[adelfa amarilla]]></kwd>
<kwd lng="es"><![CDATA[rumiantes]]></kwd>
<kwd lng="es"><![CDATA[cambio climático]]></kwd>
<kwd lng="en"><![CDATA[Fatty acids]]></kwd>
<kwd lng="en"><![CDATA[avocado]]></kwd>
<kwd lng="en"><![CDATA[yellow oleander]]></kwd>
<kwd lng="en"><![CDATA[ruminants]]></kwd>
<kwd lng="en"><![CDATA[climate change]]></kwd>
</kwd-group>
</article-meta>
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