<?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>S2007-09342016000801855</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comportamiento productivo de cinco variedades de alfalfa]]></article-title>
<article-title xml:lang="en"><![CDATA[Productive behavior of five alfalfa varieties]]></article-title>
</title-group>
<contrib-group>
<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[Hernández-Garay]]></surname>
<given-names><![CDATA[Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cansino]]></surname>
<given-names><![CDATA[Santiago Joaquín]]></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[Mendoza Pedroza]]></surname>
<given-names><![CDATA[Sergio Iban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez Vázquez]]></surname>
<given-names><![CDATA[Perpetuo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Joaquín Torres]]></surname>
<given-names><![CDATA[Bertín Maurilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas  ]]></institution>
<addr-line><![CDATA[Ciudad Victoria Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[Chapingo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad del Papaloapan  ]]></institution>
<addr-line><![CDATA[Loma Bonita Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>8</numero>
<fpage>1855</fpage>
<lpage>1866</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342016000801855&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342016000801855&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342016000801855&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La alfalfa (Medicago sativa L.) es la leguminosa forrajera más utilizada en la alimentación del ganado productor de leche en los Estados Unidos de América y México. El objetivo de esta investigación fue evaluar la respuesta productiva de cinco variedades de alfalfa con intervalos de corte definidos estacionalmente. La investigación se realizó de junio de 2010 a junio de 2011 en el Colegio de Postgraduados, México. Las variedades comerciales evaluadas fueron: San Miguelito, Júpiter, Atlixco, Vía láctea y Cuf 101, las cuales se distribuyeron aleatoriamente en 20 parcelas experimentales de 12 por 9 m, de acuerdo a un diseño de bloques completos al azar con cuatro repeticiones. Las variables evaluadas fueron: tasa de crecimiento, radiación interceptada, índice de área foliar y altura de planta. Las variedades Júpiter y Cuf 101 con 56 y 37 kg MS ha-1 d-1 registraron la mayor y menor tasa de crecimiento, respectivamente. La variedad que mayor radiación interceptada registró fue Júpiter con un promedio anual de 85%; de la cual la distribución estacional a través del año fue 95% en primavera, 93% en verano, 82% en otoño y 80% en invierno. En la estación de verano se encontró el mayor índice de área foliar con 5.4, seguido de primavera, otoño e invierno con 4.4, 3.6 y 2.1, respectivamente. En conclusión existe una relación positiva, en las cinco variedades de alfalfa, entre radiación interceptada, tasa de crecimiento, índice de área foliar y altura de planta.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Alfalfa (Medicago sativa L.) is the most commonly used legume forage in the diet of dairy cattle in the United States and Mexico. The objective of this research was to evaluate the productive response of five alfalfa varieties with defined cutting intervals seasonally. The research was conducted from June 2010 to June 2011 in the Colegio de Postgraduados, Mexico. Commercial varieties evaluated were: San Miguelito, Jupiter, Atlixco, Via lacteal and Cuf 101, which were randomly distributed into 20 experimental plots of 12 x 9 m, according to a randomized complete block with four replications. The variables evaluated were: growth rate, intercepted radiation, leaf area index and plant height. Jupiter and Cuf 101 varieties with 56 and 37 kg DM ha-1 d-1 recorded the highest and lowest growth rate, respectively. The variety that recorded higher intercepted radiation was Jupiter with an annual average of 85%; of which seasonal distribution throughout the year was 95% in spring, summer 93%, in fall 82% and winter 80%. In the summer season recorded the highest rate of leaf area with 5.4, followed by spring, autumn and winter with 4.4, 3.6 and 2.1, respectively. In conclusion there is a positive relationship in the five alfalfa varieties, between intercepted radiation, growth rate, leaf area index and plant height.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Medicago sativa]]></kwd>
<kwd lng="es"><![CDATA[altura]]></kwd>
<kwd lng="es"><![CDATA[índice de área foliar]]></kwd>
<kwd lng="es"><![CDATA[radiación interceptada]]></kwd>
<kwd lng="es"><![CDATA[tasa de crecimiento]]></kwd>
<kwd lng="en"><![CDATA[Medicago sativa]]></kwd>
<kwd lng="en"><![CDATA[growth rate]]></kwd>
<kwd lng="en"><![CDATA[height]]></kwd>
<kwd lng="en"><![CDATA[intercepted radiation]]></kwd>
<kwd lng="en"><![CDATA[leaf area index]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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