<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342020000900035</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v0i24.2356</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comportamiento productivo y calidad de pastos híbridos de Urochloa y estrella pastoreados con bovinos]]></article-title>
<article-title xml:lang="en"><![CDATA[Productive behavior and quality of hybrid pastures of Urochloa and star grass grazing with cattle]]></article-title>
</title-group>
<contrib-group>
<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[Moctezuma Villar]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas García]]></surname>
<given-names><![CDATA[Adelaido Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maldonado Peralta]]></surname>
<given-names><![CDATA[María de los Ángeles]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez Vázquez]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Santillán]]></surname>
<given-names><![CDATA[Paulino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Guerrero Facultad de Medicina Veterinaria y Zootecnia núm. 2 ]]></institution>
<addr-line><![CDATA[Cuajinicuilapa Guerrero]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Juárez Autónoma de Tabasco División Académica de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[ Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>spe24</numero>
<fpage>35</fpage>
<lpage>46</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342020000900035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342020000900035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342020000900035&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En las zonas tropicales, las gramíneas son la principal fuente de alimentación para los rumiantes, sin embargo, las condiciones ambientales y el manejo de las praderas inciden directamente en el rendimiento y calidad de las mismas. El objetivo fue estudiar el efecto del rendimiento de los pastos híbridos de Urochloa y pasto Estrella (Cynodon plectostachyus) a diferentes frecuencias e intensidades de pastoreo, con bovinos en el trópico seco. Se evaluaron los pastos Cobra, Mulato II y Cayman (Urochloa) y pasto estrella en frecuencias de corte de 28 y 35 d, e intensidades severo y ligero de 10 y 15 cm, respectivamente, que se distribuyeron de forma aleatoria en un diseño de bloques al azar con arreglo factorial 2 x 2 con tres repeticiones. Se observó efecto del manejo en la acumulación de MS, siendo mayor la acumulación a menor frecuencia e intensidad ligera de pastoreo independientemente del pasto evaluado. El pasto Cobra, Cayman y Mulato II obtuvieron el mayor rendimiento en la frecuencia a 35 d e intensidad ligera con un promedio de 6 679 kg MS ha-1 mientras que, en ese manejo el pasto estrella obtuvo el menor rendimiento con 4 028 kg MS ha-1. La mayor proteína cruda en hoja, en todos los pastos se encontró en el pastoreo severo e intensidad a 28 d con 20, 20, 18 y 10% en Cobra, Mulato II, Cayman y Estrella, respectivamente (p&lt; 0.05). Se concluye que la mayor producción del forraje se obtuvo al cosechar a una intensidad ligera de 15 cm, cada 35 d y el mayor contenido de proteína se alcanzó cuando el forraje se cosecho a intensidad de 10 cm y una frecuencia de 28 d.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In tropical areas grasses are the main source of food for ruminants, however, environmental conditions and the management of grasslands directly affect their performance and quality. The objective was to study the effect of the performance of the hybrid pastures of Urochloa and star grass (Cynodon plectostachyus) at different frequencies and grazing intensities, with cattle in the dry tropics. Cobra, Mulato II and Cayman (Urochloa) and star grass grasses were evaluated at cut frequencies of 28 and 35 d, and severe and light intensities of 10 and 15 cm, respectively, which were randomly distributed in a block design randomly with 2 x 2 factorial arrangement with three repetitions. Management effect was observed in the accumulation of DM, the accumulation being higher at a lower frequency and light grazing intensity regardless of the grass evaluated. Cobra, Cayman and Mulato II grass obtained the highest frequency yield at 35 light intensity with an average of 6 679 kg DM ha-1 while, in that handling the star grass obtained the lowest yield with 4 028 kg DM ha-1. The highest crude protein in leaf, in all pastures was found in severe grazing and intensity at 28 d with 20, 20, 18 and 10% in Cobra, Mulato II, Cayman and star grass, respectively (p&lt; 0.05). It is concluded that the highest forage production was obtained by harvesting at a light intensity of 15 cm, every 35 d and the highest protein content was reached when the forage was harvested at an intensity of 10 cm and a frequency of 28 d.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[calidad]]></kwd>
<kwd lng="es"><![CDATA[frecuencias e intensidades de pastoreo]]></kwd>
<kwd lng="es"><![CDATA[gramíneas tropicales]]></kwd>
<kwd lng="en"><![CDATA[frequencies and intensities grazing]]></kwd>
<kwd lng="en"><![CDATA[quality]]></kwd>
<kwd lng="en"><![CDATA[tropical grasses]]></kwd>
</kwd-group>
</article-meta>
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