<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952018000801071</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Fermentación ruminal y emisión de gases in vitro de dietas con diferente inclusión de semilla de girasol (Helianthus annuus)]]></article-title>
<article-title xml:lang="en"><![CDATA[In vitro ruminal fermentation and emission of gases of diets with different inclusion of sunflower seed (Helianthus annuus)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Pérez]]></surname>
<given-names><![CDATA[Jerónimo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Crosby-Galván]]></surname>
<given-names><![CDATA[María M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bárcena-Gama]]></surname>
<given-names><![CDATA[José R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Sánchez]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Mendo]]></surname>
<given-names><![CDATA[Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Salado]]></surname>
<given-names><![CDATA[Nicolás]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Monterrosa]]></surname>
<given-names><![CDATA[Rosy G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Montecillo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Guerrero  ]]></institution>
<addr-line><![CDATA[Cuajinicuilapa Guerrero]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Metropolitana  ]]></institution>
<addr-line><![CDATA[Lerma Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>52</volume>
<numero>8</numero>
<fpage>1071</fpage>
<lpage>1080</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952018000801071&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952018000801071&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952018000801071&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El metano (CH4) entérico se produce durante el proceso de fermentación energética y representa una pérdida energética de 2 a 15 %. Las semillas de oleaginosas en la alimentación de rumiantes son una alternativa para disminuir la producción de CH4. Por lo tanto, el objetivo del presente estudio fue determinar in vitro la producción de CH4, bióxido de carbono (CO2) y las características fermentativas en dietas para corderos con diferentes niveles de semilla de girasol. Los tratamientos fueron 0 (T1), 6 (T2), 12 (T3) y 18 % (T4) de inclusión de semilla de girasol en la dieta base. En las dietas se evaluó la producción de CH4, CO2, producción de ácidos grasos volátiles (AGV), degradación de la materia seca (DEGMS), fibra detergente neutro (DEGFDN) y fibra detergente ácida (DEGFDA); así como, el conteo total de bacterias (BT) a las 72 h de incubación. El diseño experimental fue completamente al azar y se realizó un análisis de polinomios ortogonales para evaluar los efectos lineal y cuadrático de los tratamientos. Al aumentar el contenido de semilla de girasol en la dieta se disminuyó DEGMS, DEGFDN y DEGFDA (p&#8804;0.05). El contenido de AGV después de 72 h de fermentación mostró una disminución lineal (p&#8804;0.05) al incrementar el contenido de semilla de girasol. La producción de CH4, CO2 y el conteo de BT no presentaron diferencias entre tratamientos (p&gt;0.05). Así, el aumento de la semilla de girasol en la dieta disminuye la capacidad de degradación de sus componentes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Enteric methane (CH4) is produced during the process of energetic fermentation and represents an energy loss of 2 to 15 %. The seeds of oleaginous plants in the feed of ruminants are an alternative for reducing the production of CH4. Therefore, the objective of the present study was to determine in vitro the production of CH4, carbon dioxide (CO2) and the fermentative characteristics in diets for lambs with different levels of sunflower seed. Treatments were 0 (T1), 6 (T2), 12 (T3) and 18 % (T4) of inclusion of sunflower seed in the base diet. The diets were evaluated for production of CH4, CO2, production of volatile fatty acids (VFA), degradation of dry matter (DEGDM), neutral detergent fiber (DEGNDF) and acid detergent fiber (DEGADF), as well as the total bacteria count (TB) at 72 h of incubation. The experimental design was completely randomized, and an analysis of orthogonal polynomials was made to evaluate the linear and quadratic effects of the treatments. When the content of sunflower seed in the diet was increased, there was a reduction of DEGDM, DEGNDF and DEGADF (p&#8804;0.05). The content of VFA after 72 h of fermentation showed a linear reduction (p&#8804;0.05) when the content of sunflower seed was increased. The production of CH4, CO2 and TB count did not present differences among treatments (p&gt;0.05). Therefore, increasing the amount of sunflower seed in the diet reduced the degradation capacity of its components.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[producción de gas]]></kwd>
<kwd lng="es"><![CDATA[metano]]></kwd>
<kwd lng="es"><![CDATA[in vitro]]></kwd>
<kwd lng="es"><![CDATA[degradación de materia seca]]></kwd>
<kwd lng="es"><![CDATA[semilla de girasol]]></kwd>
<kwd lng="en"><![CDATA[gas production]]></kwd>
<kwd lng="en"><![CDATA[methane]]></kwd>
<kwd lng="en"><![CDATA[in vitro]]></kwd>
<kwd lng="en"><![CDATA[degradation of dry matter]]></kwd>
<kwd lng="en"><![CDATA[sunflower seed]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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