<?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>0864-0394</journal-id>
<journal-title><![CDATA[Pastos y Forrajes]]></journal-title>
<abbrev-journal-title><![CDATA[Pastos y Forrajes]]></abbrev-journal-title>
<issn>0864-0394</issn>
<publisher>
<publisher-name><![CDATA[Estación Experimental de Pastos y Forrajes Indio Hatuey]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0864-03942022000100012</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Producción de carne de res en sistema de pastoreo racional Voisin]]></article-title>
<article-title xml:lang="en"><![CDATA[Beef production in Voisin rational grazing system]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Iglesias-Gómez]]></surname>
<given-names><![CDATA[Jesús Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Escudero]]></surname>
<given-names><![CDATA[José Miguel Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olivera-Castro]]></surname>
<given-names><![CDATA[Yuseika]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wencomo-Cárdenas]]></surname>
<given-names><![CDATA[Hilda Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Milera-Rodríguez]]></surname>
<given-names><![CDATA[Milagros de la Caridad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Toral Pérez]]></surname>
<given-names><![CDATA[Odalys Caridad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ministerio de Educación Superior Universidad de Matanzas Estación Experimental de Pastos y Forrajes Indio Hatuey]]></institution>
<addr-line><![CDATA[Matanzas ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,graduado de la Maestría en Pastos y Forrajes, de la Estación Experimental de Pastos y Forrajes Indio Hatuey  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>45</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-03942022000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-03942022000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-03942022000100012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Objetivo:  Caracterizar la dinámica de crecimiento de machos de ceba en pastoreo racional Voisin en suelos de topografía ondulada a quebrada, en el trópico húmedo de Los Santos, Panamá.  Materiales y Métodos:  El ensayo se desarrolló en un área de producción de 8,40 ha, dividida en 24 cuartones de 0,35 ha como promedio. Los pastos se manejaron según los principios y conceptos del pastoreo racional Voisin. Se utilizaron 53 novillos, con base Cebú y sus cruces F1 y F2 (Cebú x Holstein), divididos en dos grupos de ceba. El primer período de ceba (27 animales) duró 150 días, y 79 el segundo (26 animales). Los pesos iniciales fueron de 369 y 401 kg, para el primero y segundo grupo, respectivamente. Los pesajes para determinar el incremento de peso vivo por período y la ganancia diaria individual, se realizaron cada 30 días. Los datos se procesaron mediante un análisis de varianza y se usó la dócima de Duncan para p &lt; 0,05.  Resultados:  La presión de pastoreo fue alta (4,63 kg de MS/100 kg PV/día), con una disponibilidad de pastos promedio de 23,2 kg de MS/a/día. Los animales del primer ciclo de ceba promediaron 0,653 kg/día, con una producción de carne por hectárea de 336,63 kg. En el segundo ciclo, ganaron 0,670 kg diarios, mientras que la producción de carne fue de 145,55 kg/ha. Los dos períodos continuos de ceba permitieron al productor vender más de 24 t de carne en pie en un año.  Conclusiones:  Es factible la ceba de toros Cebú y sus cruces F1 y F2 en sistema de pastoreo racional Voisin, ya que se obtienen ganancias promedio cercanas a los 0,700 kg/animal/día, sin pérdidas de peso en los momentos de mayor escasez de alimentos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Objective:  To characterize the growth dynamics of fattening males under rational Voisin grazing conditions on soils with undulated to rough topography, in the humid tropics of Los Santos, Panama.  Materials and Methods:  The trial was conducted in a production area of 8,40 ha, divided into 24 paddocks of 0,35 ha as average. The pastures were managed according to the principles and concepts of rational Voisin grazing. Fifty-three steers were used, with Zebu basis and its F1 and F2 crossings (Zebu x Holstein), divided into two fattening groups. The first fattening period (27 animals) lasted 150 days, and the second (26 animals), 79 days. The initial weights were 369 and 401 kg, for the first and second group, respectively. The animals were weighed every 30 days to determine live weight gain per period and individual daily gain. The data were processed by variance analysis and Duncan&#8217;s test was used for p &lt; 0,05.  Results:  The grazing pressure was high (4,63 kg DM/100 kg LW/day), with an average pasture availability of 23,2 kg DM/a/day. The animals of the first fattening cycle averaged 0,653 kg/day, with a beef production per hectare of 336,63 kg. In the second cycle, they gained 0,670 kg per day; while beef production was 145,55 kg/ha. The two continuous fattening periods allowed the farmer to sell more than 24 t of live beef in one year.  Conclusions:  It is concluded that the fattening of Zebu bulls and its F1 and F2 crossings in a Voisin rational grazing system is feasible, because average gains close to 0,700 kg/animal/day are obtained, without weight loss at times of higher food shortage.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[bovidae]]></kwd>
<kwd lng="es"><![CDATA[ganancia de peso]]></kwd>
<kwd lng="es"><![CDATA[manejo de praderas]]></kwd>
<kwd lng="en"><![CDATA[bovidae]]></kwd>
<kwd lng="en"><![CDATA[weight gain]]></kwd>
<kwd lng="en"><![CDATA[pastureland management]]></kwd>
</kwd-group>
</article-meta>
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