<?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>2079-3480</journal-id>
<journal-title><![CDATA[Cuban Journal of Agricultural Science]]></journal-title>
<abbrev-journal-title><![CDATA[Cuban J. Agric. Sci.]]></abbrev-journal-title>
<issn>2079-3480</issn>
<publisher>
<publisher-name><![CDATA[Editorial del Instituto de Ciencia Animal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2079-34802021000100005</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of forage supplementation on metabolic indicators of Hartón del Valle heifers in the Colombian Amazon]]></article-title>
<article-title xml:lang="es"><![CDATA[Efecto de la suplementación con forrajeras en indicadores metabólicos de novillas Hartón del Valle en la amazonía colombiana]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Riascos-Vallejos]]></surname>
<given-names><![CDATA[A.R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Gonzales]]></surname>
<given-names><![CDATA[J.J]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dihigo]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina-Mesa]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Narvaez]]></surname>
<given-names><![CDATA[J.P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Ciencia Animal Dpto. de Rumiantes ]]></institution>
<addr-line><![CDATA[San José de Las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Servicio Nacional de Aprendizaje SENA  ]]></institution>
<addr-line><![CDATA[Regional Putumayo ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto de Investigación Pastos y Forrajes  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Centro de Investigación para el Mejoramiento Genético de la Ganadería Tropical (CIMAGT)  ]]></institution>
<addr-line><![CDATA[Cotorro La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>55</volume>
<numero>1</numero>
<fpage>43</fpage>
<lpage>56</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2079-34802021000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2079-34802021000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2079-34802021000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract To evaluate the effect of supplementation with forage on metabolic indicators of Hartón of Valle heifers, 12 bovine females were used. Animals consumed Brachiaria decumbens forage, which was supplemented with 2 kg. Treatments were: T1 Control (conventional supplement), T2 (supplement with 20% of T. gigantea) and T3 (supplement with 20% of P. discolor). For data processing, the theoretical assumptions of the analysis of variance and of normality of errors were tested. A design with repeated measures over time with four repetitions per treatment was used. A mixed linear model was applied, with the help of Proc MIXED and a mixed generalized linear model, with Proc GLIMMIX of SAS. There was interaction (P=0.0009) between treatments and sampling days, for cholesterol. There were no statistical differences among treatments for metabolites of urea, creatinine, triglycerides, glucose, calcium, phosphorus, magnesium, selenium and copper. However, there were differences in the sampling period. Supplementation with 20% of Piptocoma discolor and Trichanthera gigantea stabilized the values in the metabolic indicators of cholesterol. The substitution of 20% of the conventional supplement for P. discolor or T. gigantea did not affect the studied blood indicators. However, the increase of supplementation over time improved blood indicators of triglycerides, urea, creatinine and selenium. Thus, supplementation with 20% of inclusion of P. discolor maintained stable cholesterol levels and improved glucose levels in the 30 days of supplementation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Para evaluar el efecto de la suplementación con inclusión de forrajeras en los indicadores metabólicos de novillas Hartón del Valle, se utilizaron 12 hembras bovinas. Los animales consumieron forraje de Brachiaria decumbens, que se suplementó con 2 kg. Se establecieron tres tratamientos: T1 control (suplemento convencional), T2 (suplemento con 20 % de inclusión de T. gigantea) y T3 (suplemento con 20 % de inclusión de P. discolor). Para el procesamiento de los datos se probaron los supuestos teóricos del análisis de varianza y de la normalidad de los errores. Se utilizó un diseño con medidas repetidas en el tiempo, con cuatro repeticiones por tratamiento. Se aplicó un modelo lineal mixto con la ayuda del Proc MIXED y un modelo lineal generalizado mixto, con el Proc GLIMMIX del SAS. Hubo interacción (P=0.0009) entre tratamientos y días de muestreo para colesterol. No existieron diferencias estadísticas entre tratamientos para los metabolitos de urea, creatinina, triglicéridos, glucosa, calcio, fosforo, magnesio, selenio y cobre. Sin embargo, hubo diferencias en el período de muestreo. La suplementación con forrajeras Piptocoma discolor y Trichanthera gigantea en 20 %, estabilizó los valores en los indicadores metabólicos de colesterol. La sustitución de 20 % del suplemento convencional por P. discolor o T. gigantea no afectó los indicadores sanguíneos estudiados. Sin embargo, el incremento en el tiempo de suplementación mejoró los indicadores sanguíneos de triglicéridos, urea, creatinina y selenio. Así, la suplementación con 20 % de inclusión de P. discolor mantuvo los niveles de colesterol estables y mejoró los niveles de glucosa durante los 30 días de suplementación.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[native]]></kwd>
<kwd lng="en"><![CDATA[Piptocoma discolor]]></kwd>
<kwd lng="en"><![CDATA[blood profile]]></kwd>
<kwd lng="es"><![CDATA[criollos]]></kwd>
<kwd lng="es"><![CDATA[Piptocoma discolor]]></kwd>
<kwd lng="es"><![CDATA[perfil sanguíneo]]></kwd>
</kwd-group>
</article-meta>
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