<?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>0377-9424</journal-id>
<journal-title><![CDATA[Agronomía Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Costarricense]]></abbrev-journal-title>
<issn>0377-9424</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica. Colegio de Ingenieros y Agrónomos. Ministerio de Agricultura y Ganadería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0377-94242020000100093</article-id>
<article-id pub-id-type="doi">10.15517/rac.v44i1.40005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluation of acacia macracantha pods in balanced ration for growing rabbits]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espejo-Díaz]]></surname>
<given-names><![CDATA[Miguel Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nouel-Borges]]></surname>
<given-names><![CDATA[Gustavo Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Lisando Alvarado Decanato de Agronomía Departamento de Producción Animal]]></institution>
<addr-line><![CDATA[ Estado Lara]]></addr-line>
<country>Venezuela</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Biominbloq CA Gerencia General ]]></institution>
<addr-line><![CDATA[Las Aroitas Estado Lara]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>44</volume>
<numero>1</numero>
<fpage>93</fpage>
<lpage>104</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242020000100093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242020000100093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242020000100093&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se evaluó la atenuación de compuestos secundarios en vainas de Uveda (Acacia macracantha, Am) para su uso potencial en ración para conejos (Oryctolagus cuniculus mestizos California x Nueva Zelanda). Ensayo 1: arreglo factorial completamente al azar, factor temperatura de remojo (25, 45 y 65°C) y factor tiempo de remojo en agua (0, 6, 12, 24 y 48 h). Ensayo 2: se determinó consumo, digestibilidad y ganancia de peso evaluando ración basal (proteína cruda 183 g.kg-1 y NDF 467 g.kg-1, mezcla de harina de maíz y soya, heno de bermuda, aceite de soya, minerales y aminoácidos) y ración que contenía 30% de Am atenuada y cantidades variables de materias primas de basal (proteína cruda 184 g.kg-1 y NDF 511 g.kg-1). Se utilizaron 12 conejos por tratamiento (peso vivo 969±48,7 g y edad de 55 d). Después del período de adaptación de 7 días, se registró consumo de alimento y se recogieron heces de 62 a 89 días de edad. Del primer ensayo, la reducción de compuestos secundarios más efectiva fue con el remojo de vainas de Am durante 48 horas a 65°C. Las reducciones del contenido inicial fueron: 72,4% para polifenoles totales, 82,1% para fenoles simples, 63,3% para taninos totales, 90,8% para taninos condensados y 74,5% para taninos que precipitan proteínas. En el ensayo 2 la ingesta de alimento fue mayor para ración de Am (128 vs 107 g.d-1, p&lt;0,01), con energía bruta (11,0 vs 11,7 Mj.kg-1, p&lt;0,001) y digestibilidad de proteína bruta (66,9 vs 76,4, p&lt;0,001) más bajas en comparación con conejos alimentados con ración basal. Por el contrario, digestibilidad de fibra fue mayor en conejos alimentados con ración Am (p&lt;0,01). En conclusión, es factible incluir 30% de vainas Am atenuadas para conejos, sin embargo se requieren más experimentos para confirmar su efecto sobre la producción.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The attenuation of secondary compounds in Uveda pods (Acacia macracantha, Am) were evaluated for potential use in ration for rabbits (Oryctolagus cuniculus mestizos California x Nueva Zelanda). Test 1: a completely random factorial arrangement, soaking temperature factor (25, 45 and 65°C) and water soaking time factor (0, 6, 12, 24 and 48 h). Test 2: consumption, digestibility and weight gain were determined by evaluating baseline ration (crude protein 183 g.kg-1 and NDF 467 g.kg-1, cornmeal and soybean mixture, Bermuda hay, soybean oil, minerals and amino acids) and serving containing 30% attenuated Am and varying amounts of basal raw materials (crude protein 184 g.kg-1 and NDF 511 g.kg-1). Twelve rabbits were used per treatment (live weight 969±48.7 g and age of 55 d). After the 7-day adaptation period, food intake was recorded and feces collected from 62 to 89 days of age. From the first trial, most effective secondary compound reduction was soaking of Am pods for 48 hours at 65°C. The initial content reductions were: 72.4% for total polyphenols, 82.1% for simple phenols, 63.3% for total tannins, 90.8% for condensed tannins and 74.5% for tannins that precipitate proteins. In trial 2: food intake was higher for Am ration (128 vs 107 g.d-1, p&lt;0.01), with gross energy (11.0 vs. 11.7 Mj.kg-1, p&lt;0.001) and digestibility of Crude protein (66.9 vs 76.4, p&lt;0.001) lower compared to rabbits fed basal ration. On the contrary, fiber digestibility was higher in rabbits fed Am ration (p&lt;0.01). In conclusion, it is feasible to include 30% of attenuated Am pods for rabbits, however more experiments are required to confirm their effect on production.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Acacia macracantha vainas]]></kwd>
<kwd lng="es"><![CDATA[conejos]]></kwd>
<kwd lng="es"><![CDATA[consumo]]></kwd>
<kwd lng="es"><![CDATA[digestibilidad]]></kwd>
<kwd lng="es"><![CDATA[atenuación de compuestos secundarios]]></kwd>
<kwd lng="en"><![CDATA[Acacia macracantha pods]]></kwd>
<kwd lng="en"><![CDATA[intake]]></kwd>
<kwd lng="en"><![CDATA[rabbits]]></kwd>
<kwd lng="en"><![CDATA[digestibility]]></kwd>
<kwd lng="en"><![CDATA[attenuation of secondary compounds]]></kwd>
</kwd-group>
</article-meta>
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