<?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>0187-7380</journal-id>
<journal-title><![CDATA[Revista fitotecnia mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. fitotec. mex]]></abbrev-journal-title>
<issn>0187-7380</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitogenética A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-73802021000200143</article-id>
<article-id pub-id-type="doi">10.35196/rfm.2021.2.143</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Rendimiento y valor nutricional del pasto maralfalfa (Pennisetum sp.) a diferentes edades]]></article-title>
<article-title xml:lang="en"><![CDATA[Yield and nutritional value of maralfalfa grass (Pennisetum sp.) at different ages]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maldonado-Quiñones]]></surname>
<given-names><![CDATA[Heriberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrete-Carreón]]></surname>
<given-names><![CDATA[Francisco O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Estrada]]></surname>
<given-names><![CDATA[Osvaldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Arroyo]]></surname>
<given-names><![CDATA[Juan F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murillo-Ortiz]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Araiza-Rosales]]></surname>
<given-names><![CDATA[Elia E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Juárez del Estado de Durango  ]]></institution>
<addr-line><![CDATA[Durango Durango]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Juárez del Estado de Durango Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Durango Durango]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Juárez del Estado de Durango Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Durango Durango]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>44</volume>
<numero>2</numero>
<fpage>143</fpage>
<lpage>149</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802021000200143&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802021000200143&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802021000200143&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Existe un déficit de forraje en Durango, México durante la época de estiaje; por tal motivo, se hace necesario estudiar nuevas especies y variedades forrajeras prometedoras en términos de rendimiento y calidad del forraje. El objetivo del estudio fue determinar el rendimiento de materia verde, materia seca, composición morfológica y valor nutricional del pasto maralfalfa (Pennisetum sp.) a cuatro edades de rebrote (60, 90, 120 y 150d). El estudio se desarrolló en la Facultad de Medicina Veterinaria y Zootecnia de la Universidad Juárez del Estado de Durango. Se aplicó fertilizante en dos ocasiones con dosis de 60-00-00 por aplicación. Se utilizó un diseño completamente al azar con seis repeticiones, la unidad experimental consistió de un transecto de 1.0 m lineales. Se evaluó la composición química en muestras de planta completa y sus componentes (vainas, láminas, nudos y entrenudos). Se determinó materia seca (MS), proteína cruda (PC), cenizas (C), extracto etéreo (EE), fibra cruda (FC) y extracto libre de nitrógeno (ELN), las fracciones de fibra detergente neutro (FDN), fibra detergente acida (FDA) y lignina ácido detergente (LAD), así como la digestibilidad in vitro de la materia seca (DIVMS) y el valor relativo del forraje (VRF). Los resultados mostraron que la edad de la planta tuvo efecto (P &#8804; 0.05) sobre el rendimiento, la composición morfológica y la composición química. El contenido de PC, C, EE, VRF y la DIVMS disminuyeron conforme aumentó la edad de la planta; por el contrario, el contenido de FDN y FDA incrementaron. El pasto maralfalfa representa una opción viable para producir forraje en cantidad y calidad aceptables durante todo el año en Durango, México.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY There is a forage deficit in the state of Durango, Mexico during the dry season; for this reason, it is necessary to study new promising species and varieties for forage production in terms of yield and quality. The study aimed to determine yield, green and dry matter, morphological composition and nutritional value of maralfalfa grass (Pennisetum sp.) at four regrowth ages (60, 90, 120 y 150 d)The study was carried out at the Faculty of Veterinary Medicine of the Juarez University of the State of Durango. Fertilizer was applied twice with a dose of 60-00-00 per application. A completely randomized design with six replication was used, the experimental unit consisted of a 1.0 linear m transect. Chemical composition was evaluated in samples of the whole plant and its components (sheets, leaf surface, nodes and internodes). Dry matter (DM), crude protein (CP), ash (A), ethereal extract (EE), crude fiber (CF), nitrogen-free extract (NFE), fractions of neutral detergent fiber (NDF), acid detergent fiber (ADF) and acid detergent lignin (ADL), as well as in vitro dry matter digestibility (IVDMD) and the relative value of the forage (RVF) were determined. Results show that the age of the plant had an effect (P &#8804; 0.05) on yield, morphological composition and chemical composition. The content of CP, A, EE, as well as the RVF and IVDMD decreased as the age of the plant increased; on the contrary, the content of NDF and ADF increased. Maralfalfa grass represents a viable option for forage production in acceptable quantity and quality throughout the year in Durango, Mexico.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Calidad]]></kwd>
<kwd lng="es"><![CDATA[digestibilidad]]></kwd>
<kwd lng="es"><![CDATA[proteína]]></kwd>
<kwd lng="es"><![CDATA[valor relativo del forraje]]></kwd>
<kwd lng="en"><![CDATA[Quality]]></kwd>
<kwd lng="en"><![CDATA[digestibility]]></kwd>
<kwd lng="en"><![CDATA[protein]]></kwd>
<kwd lng="en"><![CDATA[relative value of forage]]></kwd>
</kwd-group>
</article-meta>
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