<?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>S2007-90282023000200022</article-id>
<article-id pub-id-type="doi">10.19136/era.a10n2.3383</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de aditivos y etapa fenológica sobre el valor nutricional de ensilado de Tithonia tubiformis]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of additives and phenological stage on the nutritional value of Tithonia tubiformis silage]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez-García]]></surname>
<given-names><![CDATA[Cloe Dafne]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Valdés]]></surname>
<given-names><![CDATA[Jair Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pozo-Leyva]]></surname>
<given-names><![CDATA[Dixan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arriaga-Jordán]]></surname>
<given-names><![CDATA[Carlos Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-González]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de México Instituto de Ciencias Agropecuarias y Rurales ]]></institution>
<addr-line><![CDATA[Toluca Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Tecnológico Nacional de México  ]]></institution>
<addr-line><![CDATA[Othón P. Blanco Quintana Roo]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2023</year>
</pub-date>
<volume>10</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282023000200022&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282023000200022&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282023000200022&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue evaluar ensilado de Tithonia tubiformis con diferentes aditivos para determinar composición química, parámetros de fermentación ruminal y de producción de gas in vitro. Se evaluaron dos etapas fenológicas (floración y reproductiva) y tres tratamientos de aditivos; control (CTR), melaza (MLZ) y bacterias ácido lácticas (BAL), mediante un diseño experimental factorial 3x2. Las variables evaluadas fueron materia seca (MS), materia orgánica (MO), proteína cruda (PC), fibra detergente neutro (FDN), fibra detergente acido (FDA), energía metabolizable estimada (eEM), digestibilidad in vitro de la MS (DIVMS), MO (DIVMO) y de la FDN (DIVFDN) y producción de gas in vitro. Se presentaron diferencias (P &lt; 0.05) en las variables de composición química, digestibilidad in vitro, eEM y parámetros de cinética de fermentación entre tratamientos a excepción de FDA, DIVFDN, C1, B, C2 y lag, para etapas fenológicas se presentaron diferencias (P &lt; 0.05) en todas las variables a excepción de FDN, FDA, A y C1.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective was to evaluate Tithonia tubiformis silage with different additives to determine its chemical composition, ruminal fer mentation parameters and in vitro gas production, two phenological stages (flowering and reproductive) and three additive treatments for the silages were evaluated; control (CTR), molasses (MLZ) and lactic acid bacteria (BAL), through an analysis of variance with a 3x2 factorial experimental design. The variables evaluated were dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), estimated metabolizable energy (eEM), in vitro digestibility of DM (IVDDM), MO (IVDOM) and NDF (IVDNDF), as well as in vitro gas production. Differences (P &lt; 0.05) were found in the chemical composition, in vitro digestibility, eEM and parameters of fermentation kinetics variables between treatments, except for ADF, IVNDF, C1, B, C2 and lag, regarding phenological stages there were differences (P &lt; 0.05) in all variables except for NDF, ADF, A and C1.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Alimentación animal]]></kwd>
<kwd lng="es"><![CDATA[maleza]]></kwd>
<kwd lng="es"><![CDATA[Tithonia tubiformis]]></kwd>
<kwd lng="en"><![CDATA[Animal feed]]></kwd>
<kwd lng="en"><![CDATA[weed]]></kwd>
<kwd lng="en"><![CDATA[Tithonia tubiformis]]></kwd>
</kwd-group>
</article-meta>
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