<?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>S2007-09342016000100173</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Métodos de escarificación y germinación en Brachiaria brizantha cv. Insurgente]]></article-title>
<article-title xml:lang="en"><![CDATA[Scarification and germination methods on Brachiaria brizantha cv. Insurgent]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Flores]]></surname>
<given-names><![CDATA[Edgar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quero Carrillo]]></surname>
<given-names><![CDATA[Adrián Raymundo]]></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 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[Hernández Guzmán]]></surname>
<given-names><![CDATA[Filogonio Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados en Ciencias Agrícolas  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Papaloapan  ]]></institution>
<addr-line><![CDATA[ Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Politécnica de Francisco I. Madero  ]]></institution>
<addr-line><![CDATA[ Hgo.]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>1</numero>
<fpage>173</fpage>
<lpage>184</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342016000100173&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342016000100173&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342016000100173&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se evaluaron siete métodos de escarificación para mejorar la germinación de semilla de Brachiaria brizanta cv. Insurgente en dos lotes de semilla, cosechados manualmente en otoño (septiembre; lote 1) e invierno (diciembre; lote 2), del mismo año, en terrenos de la Universidad del Papaloapan, Loma Bonita, Oaxaca. Los tratamientos incluyeron: T1= control (espiguilla completa); T2= remoción de glumas, lemas y palea del cariópside, T3= inmersión de cariópsides en ácido giberélico (AG3), 300 ppm, por 5 minutos; T4= inmersión de cariópsides en AG3, 400 ppm, por 5 min; T5= inmersión de espiguillas en ácido sulfúrico (H2SO4) concentrado por 10 minutos; T6= inmersión de espiguilla en H2SO4 concentrado por 5 min + inmersión en AG3 a 300 ppm, 5 min y T7= inmersión de espiguillas en H2SO4 concentrado por 5 min + inmersión en AG3, 400 ppm, por 5 min. Se utilizó un diseño de completamente al azar, con cuatro repeticiones de 100 semillas por tratamiento. Las variables de respuesta incluyeron germinación (%) a cuatro, cinco y seis meses post-cosecha (lote 1) y dos, tres, cuatro, cinco y seis meses poscosecha (lote 2). Se encontraron diferencias entre tratamientos (p&lt; 0. 01) para ambos lotes de semilla. La mayor germinación se obtuvo con en T4, T3 y T2. Todos los tratamientos de escarificación incrementaron el porcentaje de germinación de la semilla de pasto Insurgente respecto al control y los mejores incluyeron inmersión de la cariópside en solución de AG3 a 300 y 400 ppm, durante 5 min, así como remoción de estructuras que envuelven a la cariópside. Mientras no se desarrolle equipo de liberación de la cariópside, la aplicación de AG3 a concentraciones de 300 y 400 ppm, representa la mejor alternativa al uso de ácido sulfúrico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Seven scarification methods were evaluated in order to improve the germination of the Brachiaria brizantha cv. Insurgent seed in two lots of seeds harvested by hand in fall (September; lot 1) and winter (December; lot 2) of the same year in plots at the Universidad del Papaloapan, Loma Bonita, Oaxaca. The treatments included: T1= control (full spikelet); T2= removal of the glume, lemma and palea from the caryopsis; T3= immersion of the caryopsis in gibberellic acid (AG3), 300 ppm, for 5 minutes; T4= immersion of the caryopsis in AG3, 400 ppm, for 5 minutes; T5= immersion of spikelet in concentrated sulfuric acid (H2SO4) for 10 minutes; T6= immersion of spikelet in concentrated H2SO4 for 5 minutes + immersion in AG3 at 300 ppm, 5 minutes; T7= immersion of spikelet in concentrated H2SO4 for 5 minutes + immersion in AG3, 400 ppm, for 5 minutes. A completely random design was utilized with four repetitions of 100 seeds per treatment. The response variables included germination (%) at four, five, and six months after harvest (lot 1) and at two, three, four, five, and six months after harvest (lot 2). Differences between treatments (p&lt; 0.01) were found for both lots of seeds. The greatest germination was obtained with T4, T3, and T2. All the scarification treatments increased the germination percentage of the Insurgent grass seed with regard to the control, and the best treatments included immersion of the caryopsis in AG3 solution at 300 and 400 ppm, for 5 minutes, as well as the removal of structures from the caryopsis. As long as caryopsis liberation equipment is not developed, the application of AG3 at concentrations of 300 and 400 ppm represents the best alternative to the use of sulfuric acid.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Brachiaria brizanta]]></kwd>
<kwd lng="es"><![CDATA[dormancia]]></kwd>
<kwd lng="es"><![CDATA[germinación]]></kwd>
<kwd lng="es"><![CDATA[pasto insurgente]]></kwd>
<kwd lng="es"><![CDATA[tratamientos de escarificación]]></kwd>
<kwd lng="en"><![CDATA[Brachiaria brizantha]]></kwd>
<kwd lng="en"><![CDATA[dormancy]]></kwd>
<kwd lng="en"><![CDATA[germination]]></kwd>
<kwd lng="en"><![CDATA[insurgent grass]]></kwd>
<kwd lng="en"><![CDATA[scarification treatments]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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