<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242024000200287</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v15i2.6554</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Acumulación de materia seca, rendimiento y calidad nutricional del forraje de híbridos de maíz cosechados a diferentes días después de la siembra]]></article-title>
<article-title xml:lang="en"><![CDATA[Dry matter accumulation, yield, and nutritional quality of forage of corn hybrids harvested at different days after sowing]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Gutiérrez]]></surname>
<given-names><![CDATA[Diego Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olmos Colmenero]]></surname>
<given-names><![CDATA[José de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peña Ramos]]></surname>
<given-names><![CDATA[Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Duarte]]></surname>
<given-names><![CDATA[Juan Isidro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina Núñez]]></surname>
<given-names><![CDATA[Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallardo Ramírez]]></surname>
<given-names><![CDATA[Silviano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santana]]></surname>
<given-names><![CDATA[Omar Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de los Altos ]]></institution>
<addr-line><![CDATA[ Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental Pabellón. Aguascalientes ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias Campo Experimental La Laguna ]]></institution>
<addr-line><![CDATA[ Coahuila]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Escuela Nacional de Lechería Sustentable SPR de RL  ]]></institution>
<addr-line><![CDATA[ Jalisco]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Proteína Animal S. A. de C.V  ]]></institution>
<addr-line><![CDATA[San Juan de los Lagos Jalisco]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<volume>15</volume>
<numero>2</numero>
<fpage>287</fpage>
<lpage>301</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242024000200287&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242024000200287&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242024000200287&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue evaluar la acumulación de materia seca (MS) por componente, rendimiento y composición nutricional del forraje de cuatro híbridos de maíz cosechados a 121, 128, 135 y 142 días después de la siembra. En cada cosecha, se tomaron al azar cinco plantas y se separaron en sus componentes (tallo, hojas, grano, olote, brácteas y espiga) y se determinó la MS; en una muestra compuesta de planta completa se analizó la composición química y digestibilidad in situ. La acumulación de grano en la MS total se incrementó de 35.8 a 43.9 % de los 121 a 142 días a cosecha, respectivamente, y diluyó a los demás componentes, sobre todo la proporción de tallo y de hojas, que decrecieron inversamente proporcional a la acumulación de grano. El contenido de MS total difirió entre híbridos de 3.8 y hasta 8.3 unidades porcentuales a mismos días a cosecha. Sin embargo, el híbrido no afectó el rendimiento de MS ni la producción de grano incrementándose 2.1 y 1.4 t ha-1 entre cosecha, respectivamente. El contenido de FDN disminuyó y el almidón se incrementó (ambos linealmente), afectando la energía neta de lactancia que aumentó de 1.49 a 1.56 Mcal kg-1 de los 121 a 142 días a cosecha, respectivamente. La interacción entre días a cosecha e híbrido afectó el contenido de almidón, el cual fue 5.2 unidades superior en un híbrido con similar contenido de CNF y FDN que sus contrapartes. Las digestibilidades de la MS, de la FDN y del almidón fueron afectadas por el híbrido, pero no por los días a cosecha.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective was to evaluate the dry matter (DM) accumulation by component, yield, and nutritional composition of forage of four corn hybrids harvested at 121, 128, 135 and 142 d after sowing. In each harvest, five plants were randomly taken and separated into their components (stem, leaves, grain, cob, bracts, and tassel) and DM was determined; chemical composition and in-situ digestibility were analyzed in a composite sample of a whole plant. The accumulation of grain in the total DM increased from 35.8 to 43.9 % from 121 to 142 d to harvest, respectively, and diluted the other components, especially the proportion of stem and leaves, which decreased inversely proportional to the accumulation of grain. Total DM content differed between hybrids, from 3.8 and up to 8.3 percentage units on the same days to harvest. Nonetheless, the hybrid did not affect DM yield or grain production, increasing by 2.1 and 1.4 t ha-1 between harvests, respectively. NDF content decreased and starch increased (both linearly), affecting net energy for lactation, which increased from 1.49 to 1.56 Mcal kg-1 from 121 to 142 d to harvest, respectively. The interaction between days to harvest and hybrid affected starch content, which was 5.2 units higher in a hybrid with similar NFC and NDF content than its counterparts. DM, NDF and starch digestibilities were affected by the hybrid, but not by the days to harvest.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Almidón]]></kwd>
<kwd lng="es"><![CDATA[Ensilaje de maíz]]></kwd>
<kwd lng="es"><![CDATA[Vaca lechera]]></kwd>
<kwd lng="en"><![CDATA[Starch]]></kwd>
<kwd lng="en"><![CDATA[Corn silage]]></kwd>
<kwd lng="en"><![CDATA[Dairy cow]]></kwd>
</kwd-group>
</article-meta>
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