<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242024000400979</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v15i4.6402</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación in vitro de una fuente de nitrato protegido para rumiantes: efecto sobre la degradación de la materia seca y producción de metano]]></article-title>
<article-title xml:lang="en"><![CDATA[In vitro evaluation of a protected ruminant nitrate source: effect on dry matter degradation and methane production]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rendón-Correa]]></surname>
<given-names><![CDATA[María Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Posada-Ochoa]]></surname>
<given-names><![CDATA[Sandra Lucia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosero-Noguera]]></surname>
<given-names><![CDATA[Jaime Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Antioquia Facultad de Ciencias Agrarias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>15</volume>
<numero>4</numero>
<fpage>979</fpage>
<lpage>990</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242024000400979&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242024000400979&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242024000400979&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue evaluar un método para reducir la tasa de liberación del nitrato de calcio en un ambiente de fermentación ruminal simulado, y determinar su efecto sobre sobre la degradación de la materia seca y la producción de metano. En el experimento in vitro se usó pasto kikuyo (Cenchrus clandestinus, Hochst ex Chiov) (KK) como alimento base y la adición de nitrato protegido (NP), nitrato libre (NL) y urea (KU) al ambiente de fermentación. La cantidad de nitrato adicionado correspondió al 3 % de la materia seca incubada. Los datos se analizaron con medidas repetidas en el tiempo considerando como efectos fijos el tratamiento y el tiempo y como factor aleatorio el animal donador del inóculo ruminal. Después de 24 h de incubación, el NL y el NP redujeron la degradación de la materia seca en 11.4 y 15 %, respectivamente. La adición de nitratos redujo significativamente la producción de metano. La diferencia en las tasas de producción de metano expresadas en ml/g de materia seca degradada entre los tratamientos NL (21.0) y NP (31.2) a las 48 h de incubación, indican menor tasa de liberación del nitrato como consecuencia del método de protección empleado. Los resultados de este ensayo muestran que la inclusión de nitratos protegidos en niveles correspondientes al 3 % de la materia seca incubada pueden llegar a reducir en un 53 % la producción de metano.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective was to evaluate a method to reduce the calcium nitrate release rate in a simulated rumen fermentation environment, and to determine its effect on dry matter degradation and methane production. In the in vitro experiment, kikuyu grass (Cenchrus clandestinus, Hochst ex Chiov) (KK) was used as the base feed and the addition of protected nitrate (PN), free nitrate (FN) and urea (KU) to the fermentation environment. The amount of nitrate added corresponded to 3 % of the incubated dry matter. The data were analyzed with repeated measures over time considering treatment and time as fixed effects and the rumen inoculum donor animal as a random factor. After 24 h of incubation, FN and PN reduced dry matter degradation by 11.4 and 15 %, respectively. The addition of nitrate significantly reduced methane production. The difference in methane production rates expressed in ml/g of degraded dry matter between the FN (21.0) and PN (31.2) treatments at 48 h of incubation indicates a lower nitrate release rate as a consequence of the protection method employed. The results of this trial show that the inclusion of protected nitrates at levels corresponding to 3 % of the incubated dry matter can reduce methane production by 53 %.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Aditivos]]></kwd>
<kwd lng="es"><![CDATA[Metano]]></kwd>
<kwd lng="es"><![CDATA[Nitrato encapsulado]]></kwd>
<kwd lng="en"><![CDATA[Additives]]></kwd>
<kwd lng="en"><![CDATA[Encapsulated Nitrate]]></kwd>
<kwd lng="en"><![CDATA[Methane]]></kwd>
</kwd-group>
</article-meta>
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