<?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>S2007-11242020000100019</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v11i1.4740</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la mezcla ensilada de Pennisetum purpureum y Tithonia diversifolia sobre la fermentación ruminal in vitro y su emisión de metano en el sistema RUSITEC]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of a Pennisetum purpureum and Tithonia diversifolia silage mixture on in vitro ruminal fermentation and methane emission in a RUSITEC system]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Holguín]]></surname>
<given-names><![CDATA[Vilma A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuchillo-Hilario]]></surname>
<given-names><![CDATA[Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mazabel]]></surname>
<given-names><![CDATA[Johanna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintero]]></surname>
<given-names><![CDATA[Stiven]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora-Delgado]]></surname>
<given-names><![CDATA[Jairo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Palmira ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Tolima Grupo de Investigación Sistemas Agroforestales Pecuarios ]]></institution>
<addr-line><![CDATA[Ibagué ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,International Center for Tropical Agriculture  ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>1</numero>
<fpage>19</fpage>
<lpage>37</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242020000100019&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242020000100019&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242020000100019&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los ganaderos del trópico tradicionalmente han usado dietas con base en gramíneas con limitaciones nutricionales. Tal deficiencia, exige la suplementación con otras especies forrajeras de alta calidad proteica. El objetivo de este estudio fue evaluar la asociación de Pennisetum purpureum  ( PP) y Tithonia diversifolia (TD), así como el efecto de la adición de bacterias ácido lácticas (BAL) sobre las variables de la cinética ruminal y la producción de metano en un sistema de Simulación del Rumen (RUSITEC). Se emplearon cuatro tratamientos: T1) ensilaje de PP al 100% sin inóculo como grupo testigo; T2) mezcla de PP y TD (67:33%) sin inóculo; T3) mezcla de PP y TD (67:33%) adicionada con inóculo de BAL (Lactobacillus paracasei - T735); y T4) mezcla de PP y TD (67:33%) adicionada con inóculo comercial (Sil-all®4x4). Los datos se analizaron mediante un diseño completamente al azar. No hubo efecto de los tratamientos (T2, T3 y T4) versus testigo (T1) en la concentración de NH4-N (P&lt;0.05). En comparación con el control, T4 redujo a los ácidos grasos volátiles un 57 % (P&lt;0.0001). T4 redujo el CH4 liberado, frente al testigo (T1) 1.36 y 2.43 (mmol/g), respectivamente (P&lt;0.05). La reducción de la población de protozoos ciliados no mostró diferencias (P&gt;0.05). La disminución en la emisión de CH4 por gramo de MS en ensilajes (PP/TD), posiblemente se explica por una menor degradación de la fibra y sugiere que habrá menos emisiones de CH4 por unidad de proteína comestible producida. Sin embargo, la cantidad total de metano que se libera no fue diferente estadísticamente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Livestock diets in the tropics are traditionally based on grass species, with significant consequent nutritional limitations. Balancing the diet requires supplementation with forage species offering high quality protein. An artificial rumen simulation technique system (RUSITEC) was used to digest a mixture of the grass Pennisetum purpureum (PP) and the sunflower Tithonia diversifolia (TD). Evaluations were done of the effects of added lactic acid bacteria on rumen kinetics and methane (CH4) release. Four treatments were analyzed: T1) a control with 100% PP silage with no inoculum; T2) a PP/TD (67:33%) mixture with no inoculum; T3) a PP/TD (67:33%) mixture inoculated with the lactic acid bacteria (LAB) Lactobacillus paracasei T735; and T4) a PP/TD (67:33%) mixture inoculated with the commercial Sil-All®4x4 LAB. Data were analyzed with a completely random design. Ammonium concentration did not differ (P&gt;0.05) between the treatments (T2, T3 and T4) and the control (T1). The T4 treatment lowered volatile fat acids by 57 % compared to the control (P&lt;0.001). Methane release was also lower (P&lt;0.05) in T4 (1.36 mmol/g) than in the control (2.43 mmol/g), although levels were also relatively low in T3. The ciliate protozoa population did not differ among the treatments or with the control (P&gt;0.05). The decrease in methane emission per gram dry matter in the PP/TD silages was probably due to lower fiber degradation levels. This suggests that methane emissions were lower per unit of edible animal protein produced even though the total amount of methane released did not differ.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Defaunación]]></kwd>
<kwd lng="es"><![CDATA[Fibra]]></kwd>
<kwd lng="es"><![CDATA[Protozoos]]></kwd>
<kwd lng="es"><![CDATA[Digestión]]></kwd>
<kwd lng="es"><![CDATA[Ensilaje]]></kwd>
<kwd lng="en"><![CDATA[Defaunation]]></kwd>
<kwd lng="en"><![CDATA[Fiber]]></kwd>
<kwd lng="en"><![CDATA[Protozoa]]></kwd>
<kwd lng="en"><![CDATA[Digestion]]></kwd>
<kwd lng="en"><![CDATA[Silage]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rosales]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mezclas de forrajes: uso de la diversidad forrajera tropical en sistemas agroforestales]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Rosales]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Murgueitio]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Osorio]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Agroforestería para la producción animal en Latinoamérica]]></source>
<year>1999</year>
<page-range>201-31</page-range><publisher-loc><![CDATA[Roma ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Holguín]]></surname>
<given-names><![CDATA[VA]]></given-names>
</name>
<name>
<surname><![CDATA[Ortiz.Grisalez]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Velasco Navia]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Mora.Delgado]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Multi-criteria evaluation of 44 introductions of Tithonia diversifolia (Hemsl.) A. Gray in Candelaria, Valle del Cauca]]></article-title>
<source><![CDATA[Rev Med Vet Zoot]]></source>
<year>2015</year>
<volume>62</volume>
<page-range>57-72</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hess]]></surname>
<given-names><![CDATA[HD]]></given-names>
</name>
<name>
<surname><![CDATA[Monsalve]]></surname>
<given-names><![CDATA[LM]]></given-names>
</name>
<name>
<surname><![CDATA[Lascano]]></surname>
<given-names><![CDATA[CE]]></given-names>
</name>
<name>
<surname><![CDATA[Carulla]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Díaz]]></surname>
<given-names><![CDATA[TE]]></given-names>
</name>
<name>
<surname><![CDATA[Kreuzer]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Supplementation of a tropical grass diet with forage legumes and Sapindus saponaria fruits: effects on in vitro ruminal nitrogen turnover and methanogenesis]]></article-title>
<source><![CDATA[Aust J Agric Res]]></source>
<year>2003</year>
<volume>547</volume>
<page-range>703-13</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rao]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Peters]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Schultze-Kraft]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[White]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Fisher]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Livestock Plus: sustainable intensification of tropical forage.based systems for improving livelihood and environmental benefits]]></article-title>
<source><![CDATA[Trop Grassl . Forr Trop]]></source>
<year>2015</year>
<volume>3</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>59-82</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ribeiro]]></surname>
<given-names><![CDATA[RS]]></given-names>
</name>
<name>
<surname><![CDATA[Terry]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[Sacramento]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Silveira]]></surname>
<given-names><![CDATA[SRE]]></given-names>
</name>
<name>
<surname><![CDATA[Bento]]></surname>
<given-names><![CDATA[CBP]]></given-names>
</name>
<name>
<surname><![CDATA[da Silva]]></surname>
<given-names><![CDATA[EF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tithonia diversifolia as a supplementary feed for dairy cows]]></article-title>
<source><![CDATA[PLoS One]]></source>
<year>2016</year>
<volume>11</volume>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Holguín]]></surname>
<given-names><![CDATA[VA]]></given-names>
</name>
<name>
<surname><![CDATA[Cuchillo]]></surname>
<given-names><![CDATA[HM]]></given-names>
</name>
<name>
<surname><![CDATA[Mazabel]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Martens]]></surname>
<given-names><![CDATA[SD.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[-vitro assessment for ensilabillity of Tithonia diversifolia alone or with Pennisetum purpureum using epiphytic lactic acid bacteria strains as inocula]]></article-title>
<source><![CDATA[Acta Sci Anim Sci]]></source>
<year>2018</year>
<volume>40</volume>
<numero>e37940</numero>
<issue>e37940</issue>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ojeda]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Técnicas de cosecha y ensilaje]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Mannetje]]></surname>
<given-names><![CDATA[L´t.]]></given-names>
</name>
</person-group>
<source><![CDATA[Uso del ensilaje en el trópico privilegiando opciones para pequeños campesinos]]></source>
<year>2001</year>
<page-range>137-46</page-range><publisher-loc><![CDATA[Roma ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pinto-Ruiz]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Guevara]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Gómez]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Medina]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Preferencia de ovinos por el ensilaje de Pennisetum purpureum mezclado con arbóreas forrajeras tropicales]]></article-title>
<source><![CDATA[Livest Res Rural Dev]]></source>
<year>2010</year>
<volume>22</volume>
<page-range>106</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lezcano]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Soca]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[LM]]></given-names>
</name>
<name>
<surname><![CDATA[Ojeda]]></surname>
<given-names><![CDATA[FF]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Fontes]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Santana]]></surname>
<given-names><![CDATA[HH.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Caracterización cualitativa del contenido de metabolitos secundarios en la fracción comestible de Tithonia diversifolia Hemsl]]></article-title>
<source><![CDATA[A. Gray. Spanish. Past Forr]]></source>
<year>2012</year>
<volume>353</volume>
<page-range>283-92</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fasuyi]]></surname>
<given-names><![CDATA[AO]]></given-names>
</name>
<name>
<surname><![CDATA[Ibitayo]]></surname>
<given-names><![CDATA[FJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrogen balance and morphometric traits of weanling pigs fed graded levels of wild sunflower Tithonia diversifolia leaf meal]]></article-title>
<source><![CDATA[Afr J Food Agric Nutr Dev]]></source>
<year>2011</year>
<volume>113</volume>
<page-range>1-17</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Heinritz]]></surname>
<given-names><![CDATA[SN]]></given-names>
</name>
<name>
<surname><![CDATA[Martens]]></surname>
<given-names><![CDATA[SD]]></given-names>
</name>
<name>
<surname><![CDATA[Avila]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Hoedtke]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of inoculant and sucrose addition on the silage quality of tropical forage legumes with varying ensilability]]></article-title>
<source><![CDATA[Anim Feed Sci Technol]]></source>
<year>2012</year>
<volume>174</volume>
<numero>3.4</numero>
<issue>3.4</issue>
<page-range>201-10</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kleinschmit]]></surname>
<given-names><![CDATA[DH]]></given-names>
</name>
<name>
<surname><![CDATA[Kung Jr]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A meta-analysis of the effects of Lactobacillus buchneri on the fermentation and aerobic stability of corn and grass and small-grain silages]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2006</year>
<volume>89</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>4005-13</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rymer]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Huntington]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Wlliams]]></surname>
<given-names><![CDATA[BA]]></given-names>
</name>
<name>
<surname><![CDATA[Dl.]]></surname>
<given-names><![CDATA[Givens]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[In vitro accumulative gas production techniques: History, methodological considerations and challenges]]></article-title>
<source><![CDATA[Anim Feed Sci Technol]]></source>
<year>2005</year>
<volume>123</volume>
<page-range>9-30</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Menke]]></surname>
<given-names><![CDATA[KH]]></given-names>
</name>
<name>
<surname><![CDATA[Steingass]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid]]></article-title>
<source><![CDATA[Anim Res Dev]]></source>
<year>1988</year>
<volume>28</volume>
<page-range>7-55</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abel]]></surname>
<given-names><![CDATA[HJ]]></given-names>
</name>
<name>
<surname><![CDATA[Irmgard]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[da Costa Gómez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Steinberg]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of increasing dietary concentrate levels on microbial biotin metabolism in the artificial rumen simulation system RUSITEC]]></article-title>
<source><![CDATA[Arch Tierernahr]]></source>
<year>2001</year>
<volume>554</volume>
<page-range>371-6</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
<name>
<surname><![CDATA[Ranilla]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Tejido]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[SS]]></given-names>
</name>
<name>
<surname><![CDATA[Carro]]></surname>
<given-names><![CDATA[MD.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of fermentation of diets of variable composition and microbial populations in the rumen of sheep and Rusitec fermenters. I. Digestibility, fermentation parameters, and microbial growth]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2010</year>
<page-range>3684-98</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Czerkawski]]></surname>
<given-names><![CDATA[JW]]></given-names>
</name>
<name>
<surname><![CDATA[Breckenridge]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Design and development of a long-term rumen simulation technique Rusitec]]></article-title>
<source><![CDATA[Br J Nutr]]></source>
<year>1977</year>
<volume>38</volume>
<page-range>371.384</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Machmuller]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Soliva]]></surname>
<given-names><![CDATA[CR]]></given-names>
</name>
<name>
<surname><![CDATA[Kreuzer]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[In vitro ruminal methane suppression by lauric acid as influenced by dietary calcium]]></article-title>
<source><![CDATA[Can J Anim Sci]]></source>
<year>2002</year>
<volume>82</volume>
<page-range>233-9</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hoedtke]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Zeyner]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparative evaluation of laboratory-scale silages using standard glass jar silages or vacuum-packed model silages]]></article-title>
<source><![CDATA[J Sci Food Agric]]></source>
<year>2011</year>
<volume>91</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>841-9</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[McDougall]]></surname>
<given-names><![CDATA[EI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Studies on ruminant saliva l. The composition and output of sheep´s saliva]]></article-title>
<source><![CDATA[Biochem J]]></source>
<year>1948</year>
<volume>43</volume>
<page-range>99-109</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="">
<collab>Association of Official Analytical Chemists</collab>
<source><![CDATA[Fiber acid detergent and lignin H2SO4 in animal feed]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Gaithersburg, MD, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="book">
<collab>Association of Official Analytical Chemists</collab>
<source><![CDATA[Moisture in animal, loss on drying at 135 C for 2 hours]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Gaithersburg, MD, USA ]]></publisher-loc>
<publisher-name><![CDATA[AOAC International]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Van Soest]]></surname>
<given-names><![CDATA[PJ]]></given-names>
</name>
<name>
<surname><![CDATA[Robertson]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Lewis]]></surname>
<given-names><![CDATA[BA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methods for dietary fiber neutral detergent fiber and nonstarch polysaccharides in relation to animal nutrition]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>1991</year>
<numero>7410</numero>
<issue>7410</issue>
<page-range>3583-97</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tilley]]></surname>
<given-names><![CDATA[JMA]]></given-names>
</name>
<name>
<surname><![CDATA[Terry]]></surname>
<given-names><![CDATA[RA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A two stage technique for in vitro digestion of forage crops]]></article-title>
<source><![CDATA[Grass Forage Sci]]></source>
<year>1963</year>
<volume>182</volume>
<page-range>104-11</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moore]]></surname>
<given-names><![CDATA[JE.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Procedures for the two-stage in vitro digestion of for ages]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Harris]]></surname>
<given-names><![CDATA[L.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Nutrition research techniques for domestic and wild animals]]></source>
<year>1970</year>
<volume>1</volume>
<publisher-loc><![CDATA[Logan ]]></publisher-loc>
<publisher-name><![CDATA[Utah State University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Conceptos y práctica de microbiología general]]></source>
<year>2011</year>
</nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Roa]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Castillo]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
<name>
<surname><![CDATA[Tellez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influencia del tiempo de maduración en la calidad nutricional de ensilajes con forrajes arbóreos]]></article-title>
<source><![CDATA[Rev Sist Prod Agroecol]]></source>
<year>2010</year>
<volume>11</volume>
<page-range>63-73</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barahona]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Limitaciones físicas y químicas de la digestibilidad de pastos tropicales y estrategias para aumentarla]]></article-title>
<source><![CDATA[Rev Corpoica Ciencia y Tecnol Agropecuaria]]></source>
<year>200</year>
<volume>5</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>69-82</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Krause]]></surname>
<given-names><![CDATA[KM]]></given-names>
</name>
<name>
<surname><![CDATA[Oetzel]]></surname>
<given-names><![CDATA[GR.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Understanding and preventing subacute ruminal acidosis in dairy herds: A review]]></article-title>
<source><![CDATA[Anim Feed Sci Technol]]></source>
<year>2006</year>
<volume>126</volume>
<page-range>215-36</page-range></nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Emery]]></surname>
<given-names><![CDATA[RS]]></given-names>
</name>
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[CK]]></given-names>
</name>
<name>
<surname><![CDATA[Grimes]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
<name>
<surname><![CDATA[Huffman]]></surname>
<given-names><![CDATA[CF]]></given-names>
</name>
<name>
<surname><![CDATA[Duncan]]></surname>
<given-names><![CDATA[CW.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Physical and chemical changes in bovine saliva and rumen liquid with different hay-grain rations]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>1960</year>
<volume>431</volume>
<page-range>76-80</page-range></nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Calsamiglia]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Ferret]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Fisiología ruminal relacionada con la patología digestiva: acidosis y meteorismo]]></source>
<year>2002</year>
<publisher-loc><![CDATA[Barcelona, España ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B32">
<label>32</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Araujo]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Vergara-López]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Propiedades físicas y químicas del rumen. Arch Latinoam]]></article-title>
<source><![CDATA[Prod Anim]]></source>
<year>2007</year>
<volume>15</volume>
<page-range>133-40</page-range></nlm-citation>
</ref>
<ref id="B33">
<label>33</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mathison]]></surname>
<given-names><![CDATA[GW]]></given-names>
</name>
<name>
<surname><![CDATA[Okine]]></surname>
<given-names><![CDATA[EK]]></given-names>
</name>
<name>
<surname><![CDATA[McAllister]]></surname>
<given-names><![CDATA[TA]]></given-names>
</name>
<name>
<surname><![CDATA[Dong]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Galbraith]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Dmytruk]]></surname>
<given-names><![CDATA[OIN.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reducing methane emissions from ruminant animals]]></article-title>
<source><![CDATA[J Appl Anim Res]]></source>
<year>1998</year>
<volume>14</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-28</page-range></nlm-citation>
</ref>
<ref id="B34">
<label>34</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Posada]]></surname>
<given-names><![CDATA[SL]]></given-names>
</name>
<name>
<surname><![CDATA[Noguera]]></surname>
<given-names><![CDATA[RR.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[in vitro de producción de gases: Una herramienta para la evaluación de alimentos para rumiantes (In vitro technique of gas production: a tool for feed assesment for ruminants).]]></article-title>
<source><![CDATA[Livest Res Rural Dev]]></source>
<year>2005</year>
<volume>17</volume>
</nlm-citation>
</ref>
<ref id="B35">
<label>35</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García-González]]></surname>
<given-names><![CDATA[RR]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[SS.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Decrease of ruminal methane production in Rusitec fermenters through the addition of plant material from rhubarb (Rheum spp). and alder buckthorn (Frangula alnus)]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2010</year>
<volume>938</volume>
<page-range>3755-63</page-range></nlm-citation>
</ref>
<ref id="B36">
<label>36</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jarrige]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ruckbusch]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Demarquily]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Farce]]></surname>
<given-names><![CDATA[MH]]></given-names>
</name>
<name>
<surname><![CDATA[Journet]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Nutrition des ruminants domestiques: Ingestion et digestion]]></source>
<year>1995</year>
<publisher-loc><![CDATA[Paris ]]></publisher-loc>
<publisher-name><![CDATA[INRA editions]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B37">
<label>37</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[MRF]]></given-names>
</name>
<name>
<surname><![CDATA[Merry]]></surname>
<given-names><![CDATA[RJ]]></given-names>
</name>
<name>
<surname><![CDATA[Davies]]></surname>
<given-names><![CDATA[DR]]></given-names>
</name>
<name>
<surname><![CDATA[Moorby]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Humphreys]]></surname>
<given-names><![CDATA[MO]]></given-names>
</name>
<name>
<surname><![CDATA[Theodorou]]></surname>
<given-names><![CDATA[MK]]></given-names>
</name>
<name>
<surname><![CDATA[MacRae]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<name>
<surname><![CDATA[Scolland]]></surname>
<given-names><![CDATA[ND.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of increasing availability of water-soluble carbohydrates on in.vitro rumen fermentation]]></article-title>
<source><![CDATA[Anim Feed Sci Technol]]></source>
<year>2003</year>
<volume>104</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>59-70</page-range></nlm-citation>
</ref>
<ref id="B38">
<label>38</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Merry]]></surname>
<given-names><![CDATA[RJ]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
<name>
<surname><![CDATA[Davies]]></surname>
<given-names><![CDATA[DR]]></given-names>
</name>
<name>
<surname><![CDATA[Dewhurst]]></surname>
<given-names><![CDATA[RJ]]></given-names>
</name>
<name>
<surname><![CDATA[Moorby]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Scollan]]></surname>
<given-names><![CDATA[ND]]></given-names>
</name>
<name>
<surname><![CDATA[Theodorou]]></surname>
<given-names><![CDATA[MK.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of high-sugar ryegrass silage and mixtures with red clover silage on ruminant digestion. 1. In vitro and in vivo studies of nitrogen utilization]]></article-title>
<source><![CDATA[J Anim Sci]]></source>
<year>2006</year>
<volume>8411</volume>
<page-range>3049-60</page-range></nlm-citation>
</ref>
<ref id="B39">
<label>39</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abreu A]]></surname>
<given-names><![CDATA[Carulla JE]]></given-names>
</name>
<name>
<surname><![CDATA[Kreuzer M]]></surname>
<given-names><![CDATA[Lascano CE]]></given-names>
</name>
<name>
<surname><![CDATA[Diaz TE]]></surname>
<given-names><![CDATA[Cano A]]></given-names>
</name>
<name>
<surname><![CDATA[Hess]]></surname>
<given-names><![CDATA[HD.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto del fruto, del pericarpio y del extracto semipurificado de saponinas de Sapindus saponaria sobre la fermentación ruminal y la metanogenesis in vitro en un sistema RUSITEC]]></article-title>
<source><![CDATA[Rev Col Cienc Pecu]]></source>
<year>2003</year>
<volume>162</volume>
<page-range>147-54</page-range></nlm-citation>
</ref>
<ref id="B40">
<label>40</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Satter]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
<name>
<surname><![CDATA[Slyter]]></surname>
<given-names><![CDATA[LL.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of ammonia concentration on rumen microbial protein production in vitro]]></article-title>
<source><![CDATA[British J Nutr]]></source>
<year>1974</year>
<volume>32</volume>
<page-range>199-208</page-range></nlm-citation>
</ref>
<ref id="B41">
<label>41</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Holguín]]></surname>
<given-names><![CDATA[VA.]]></given-names>
</name>
</person-group>
<source><![CDATA[Optimización de Tithonia diversifolia ensilada como alimento para ovinos de pelo]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Palmira, Colombia ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B42">
<label>42</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[La O]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Valenciaga]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Orozco]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Castillo]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Ruíz]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Arzola]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de la combinación de Tithonia diversifolia y Pennisetum purpureum vc. Cuba CT.115 en la cinética y producción de gas in vitro]]></article-title>
<source><![CDATA[Rev Cuba Ciencia Agrí]]></source>
<year>2009</year>
<volume>43</volume>
<page-range>149-52</page-range></nlm-citation>
</ref>
<ref id="B43">
<label>43</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Patra]]></surname>
<given-names><![CDATA[AK]]></given-names>
</name>
<name>
<surname><![CDATA[Saxena]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Exploitation of dietary tannins to improve rumen metabolism and ruminant nutrition]]></article-title>
<source><![CDATA[J Sci Food Agric]]></source>
<year>2011</year>
<volume>91</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>24-37</page-range></nlm-citation>
</ref>
<ref id="B44">
<label>44</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Verdecia]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Leonard]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Álvarez]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Bazán]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Bodas]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Andrés]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Álvarez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Giráldez]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Calidad de la Tithonia diversifolia en una zona del Valle del Cauto]]></source>
<year>2011</year>
<page-range>125</page-range><publisher-name><![CDATA[REDVET]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
