<?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>S0864-03942021000100028</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Producción de forraje y composición nutricional de cuatro variedades de Avena sativa L. en Ubaté, Cundinamarca, Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Forage production and nutritional composition of four varieties of Avena sativa L. in Ubaté, Cundinamarca, Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Uribe]]></surname>
<given-names><![CDATA[René Adolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuesta-Peralta]]></surname>
<given-names><![CDATA[Aurora]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carvajal-Salcedo]]></surname>
<given-names><![CDATA[Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gracia-Díaz]]></surname>
<given-names><![CDATA[Tomás Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Cundinamarca Facultad de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Ciencias Aplicadas y Ambientales Facultad de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>44</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-03942021000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-03942021000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-03942021000100028&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Objetivo:  Evaluar el comportamiento forrajero y la composición química de cuatro variedades de Avena sativa L. en Ubaté, Cundinamarca, Colombia.  Materiales y Métodos:  El ensayo se realizó en la Unidad Agroambiental El Tíbar, de la Universidad de Cundinamarca, ubicada en la vereda Palo Gordo, Colombia. El experimento se condujo mediante un diseño en bloques completos al azar. Cada bloque correspondió a dos períodos de momentos de siembra (octubre-noviembre y abril-mayo). Los tratamientos correspondieron a cuatro variedades de A. sativa: cayuse, konan, everleaf y suprema. Las unidades experimentales constaban de parcelas de 4 m2. Se midió la altura de las plantas y se procedió a cortar con un marco de 1x1 m para determinar la producción de forraje. Se tomaron muestras para medir la calidad por medio de un análisis químico nutricional.  Resultados:  El valor promedio de la altura de las plantas en el momento del corte fue de 167 cm, con diferencias significativas (p &lt; 0,05) entre variedades. Se destacó la variedad cayuse, con 175 cm, que fue la más alta. No se presentaron diferencias significativas respecto a la producción de biomasa, cuyo promedio fue de 31,5 ± 7,26 t/ha. Con relación a la composición química, la materia seca presentó diferencias significativas (p &lt; 0,05), con los mayores valores para la variedad everleaf en ambas épocas de siembra, con un promedio de 24,6 %. La energía bruta alcanzó un promedio de 4 208 kcal/kg, con los mayores valores (p &lt; 0,05) en la variedad suprema. La digestibilidad de la materia seca a las 48 h promedió 54,9 %, sin diferencias significativas entre las cuatro variedades de A. sativa. Lo mismo ocurrió para la proteína degradada en el rumen (promedio de 94,5 %) y la degradabilidad de la fibra detergente neutro (53,8 %).  Conclusiones:  La época de siembra no influyó en la producción de biomasa ni en la composición nutricional de las diferentes variedades de avena evaluadas, que obtuvieron resultados similares.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Objective:  To evaluate the forage performance and chemical composition of four varieties of Avena sativa L. in Ubaté, Cundinamarca, Colombia.  Materials and Methods:  The essay was conducted in the Agro-Environmental Unit El Tíbar, of the University of Cundinamarca, located on the Palo Gordo district, Colombia. The experiment was conducted through a randomized block design. Each block corresponded to two periods of planting moments (October-November and April-May). The treatments corresponded to four A. sativa varieties: cayuse, konan, everleaf and suprema. The experimental units had plots of 4 m2. Plant height was measured and cutting was done with a frame of 1 x 1 m to determine forage production. Samples were taken to measure quality by a chemical-nutritional analysis.  Results: The average value of plant height at the moment of cutting was 167 cm, with significant differences (p &lt; 0,05) among varieties. The variety cayuse stood out, with 175 cm, which was the tallest. No significant differences were shown regarding the biomass production, whose average was 31,5 ± 7,26 t/ha. With regards to the chemical composition, dry matter showed significant differences (p &lt; 0,05), with the highest values for the variety everleaf in both planting seasons, with an average of 24,6 %. Crude energy reached an average of 4 208 kcal/kg, with the highest values (p &lt; 0,05) in the variety suprema. The dry matter digestibility at 48 h averaged 54,9 %, without significant differences among the four A. sativa varieties. The same occurred for the degraded protein in the rumen (average of 94,5 %) and degradability of the neutral detergent fiber (53,8 %).  Conclusions:  The planting season did not influence biomass production or the nutritional composition of the different evaluated oat varieties, which obtained similar results.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biomasa]]></kwd>
<kwd lng="es"><![CDATA[valor nutritivo]]></kwd>
<kwd lng="es"><![CDATA[producción lechera]]></kwd>
<kwd lng="en"><![CDATA[biomass]]></kwd>
<kwd lng="en"><![CDATA[nutritional value]]></kwd>
<kwd lng="en"><![CDATA[milk production]]></kwd>
</kwd-group>
</article-meta>
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<publisher-name><![CDATA[CESICH, CIRNOC, INIFAP, SAGARPA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tilley]]></surname>
<given-names><![CDATA[J. M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Terry]]></surname>
<given-names><![CDATA[R. A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A two-stage technique for the in vitro digestion of forage crops]]></article-title>
<source><![CDATA[Grass Forage Sci]]></source>
<year>1963</year>
<volume>18</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>104-11</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
