<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442021000100090</article-id>
<article-id pub-id-type="doi">10.15517/rbt.v69i1.41822</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Composición química y producción de follaje de Erythrina americana (Fabaceae) en cercos vivos durante dos épocas climáticas]]></article-title>
<article-title xml:lang="en"><![CDATA[Chemical composition and foliage production of Erythrina americana (Fabaceae) in living fences during two climatic seasons]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliva-Hernández]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Herrera]]></surname>
<given-names><![CDATA[María-Aurelia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Linares]]></surname>
<given-names><![CDATA[Erika-Belem]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[ Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[ Yucatán]]></addr-line>
<country>Mexico</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>69</volume>
<numero>1</numero>
<fpage>90</fpage>
<lpage>101</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442021000100090&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442021000100090&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442021000100090&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: Erythrina americana es una leguminosa arbórea que se encuentra como parte del cerco en las fincas ganaderas de la región tropical. Sin embargo, los productores de ovinos no utilizan el follaje de este tipo de leguminosa de forma rutinaria o estratégica como complemento alimenticio debido, en parte, por el desconocimiento de su composición química y rendimiento foliar, así como, por los factores que los afectan.  Objetivo:  Determinar la influencia de la época climática y diámetro del árbol E. americana en la composición química y rendimiento de follaje a una edad de rebrote de 90 días.  Método:  Se utilizaron 47 árboles en un diseño de dos factores. Los factores fueron época (sequía y lluvias) y diámetro del árbol a 0.20 m de altura del suelo (D-9 entre 0.05 y 0.09 m y D-13, entre 0.091 y 0.13 m). Las variables respuesta fueron producción de materia seca y proteína bruta foliar (kg árbol-1).  Resultados:  La época no afectó (P &gt; 0.05) la producción de materia seca y proteína bruta. Sin embargo, el diámetro de E. americana si las afectó (P &lt; 0.01). En el diámetro D-13 se detectó la mayor producción de materia seca y proteína bruta foliar con respecto a D-9.  Conclusión:  El diámetro del árbol tuvo mayor influencia que la época en el rendimiento de materia seca y proteína bruta foliar.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Erythrina americana is a tree legume found as part of the fence of livestock farms of the tropical region. However, sheep farmers do not routinely or strategically use the foliage of this type of legume as a dietary supplement due, in part, to ignorance of its chemical composition and foliar performance, as well as the factors that affect them.  Objective:  To determine the influence of season and diameter of E. americana tree on the chemical composition and foliage yield at a 90-day regrowth age.  Methods:  47 trees were used in a two-factor design. The factors were season (dry and rainy) and tree diameter at 0.20 m above ground level (D-9 between 0.05 and 0.09 m and D-13, between 0.091 to 0.13 m). The response variables were dry matter production and crude protein from foliage (kg árbol-1).  Results:  The season did not affect (P &gt; 0.05) the production of dry matter and crude protein. However, the diameter of E. americana affected them (P &lt; 0.01). In diameter D-13, the highest production of dry matter and crude foliar protein tree-1 was detected with respect to D-9.  Conclusions:  The diameter of the tree had a more influence than the season on yield of dry matter and crude protein.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[humid tropic]]></kwd>
<kwd lng="en"><![CDATA[live fence]]></kwd>
<kwd lng="en"><![CDATA[sheep feeding]]></kwd>
<kwd lng="en"><![CDATA[tree legume]]></kwd>
<kwd lng="es"><![CDATA[trópico húmedo]]></kwd>
<kwd lng="es"><![CDATA[cerco vivo]]></kwd>
<kwd lng="es"><![CDATA[alimentación de ovinos]]></kwd>
<kwd lng="es"><![CDATA[leguminosa arbórea]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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