<?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>1659-1321</journal-id>
<journal-title><![CDATA[Agronomía Mesoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Mesoam]]></abbrev-journal-title>
<issn>1659-1321</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-13212016000100037</article-id>
<article-id pub-id-type="doi">10.15517/am.v27i1.21876</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Bromatología de ensilados de corona de piña con pulpa de cítricos, heno y urea]]></article-title>
<article-title xml:lang="en"><![CDATA[Bromatological composition of pineapple crown silage with citrus pulp, hay, and urea]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Herrera]]></surname>
<given-names><![CDATA[Michael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[WingChing-Jones]]></surname>
<given-names><![CDATA[Rodolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Bourrillon]]></surname>
<given-names><![CDATA[Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica  Escuela de Zootecnia]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>CR</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<volume>27</volume>
<numero>1</numero>
<fpage>37</fpage>
<lpage>47</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-13212016000100037&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-13212016000100037&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-13212016000100037&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[ResumenEl objetivo de esta investigación fue determinar las características nutricionales de los ensilados de mezclas de corona de la piña con inclusión de pulpa de cítricos deshidratada y heno, con niveles crecientes de urea. El experimento fue realizado entre los meses de mayo a setiembre del 2013 y las coronas provenían de Guápiles, Costa Rica. Estas fueron picadas hasta obtener una partícula promedio de 3 cm, y colocadas en bolsas de empaque al vacío a las que se les agregó, urea (0;0,5;1,0;1,5% p/p en base fresca), dos fuentes altas en materia seca: heno (H) de pasto Transvala (Digitaria decumbens, Stent., cv. Transvala) y pulpa de cítricos deshidratada (PCD) ambos a un nivel de inclusión (10% p/p en base fresca), y un único nivel de melaza (3% p/p) e inóculo bacterial por fermentación de melaza con suero de leche (1 l/t). Además se preparó una muestra sin aditivos como control. El heno aumentó el contenido de materia seca y todos los componentes de la fibra, pero redujo el contenido de proteína cruda (PC), carbohidratos no fibrosos y nutrimentos digestibles totales. Cuando se usó PCD, se redujo la fracción fibrosa, lo que aumentó la digestibilidad de la mezcla ensilada. El uso de urea aumentó el contenido de PC y redujo el nivel de nitrógeno ligado a la fibra por un efecto de dilución. Se estimó que los materiales ensilados podrían producir 0,43-1,89 kg leche/vaca, al consumir 5 kg material verde (MV)/animal; 0,86-3,77 kg leche/vaca, al consumir 10 kg MV/animal; 1,295,66 kg leche/vaca, al consumir 15 kg MV/animal.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[AbstractThe objective of this study was to determine the nutritional characteristics of silage mixtures of pineapple crown including dehydrated citrus pulp and hay, with increasing levels of urea. The experiment was conducted between May to September 2013 and the crowns were from Guapiles, Costa Rica. These were chopped to obtain an average particle size of 3 cm, and packaged in vacuum- sealed bags to which were added: urea (0, 0.5, 1.0, 1.5% w/w fresh basis), 2 high sources of dry matter: hay (H) of Transvala grass (Digitaria decumbens Stent, cv Transvala) and dehydrated citrus pulp (DCP), both at a level of inclusion (10% w/w fresh basis), and a single level of molasses (3% w/w) and bacterial inoculum by molasses fermentation with whey (1 l/t). Also a sample without additives was prepared as a control. Hay increased dry matter content and all fiber components, but reduced crude protein content, non fibrous carbohydrates, and total digestible nutrients. When PCD was used, the fiber level was reduced which increased digestibility of ensiled mixture. The use of urea increased the CP content and reduced nitrogen linked to fiber by a dilution effect. It was estimated that, silage materials allow to obtain from 0.43 to 1.89 kg of milk/cow, whenconsuming 5 kg fresh matter (FM)/animal; 0.86 to 3.77 kg milk/cow when consuming 10 kg FM/animal; 1.29 to 5.66 kg milk/cow when consuming 15 kg FM/animal.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[conservación de forrajes]]></kwd>
<kwd lng="es"><![CDATA[nutrición de rumiantes]]></kwd>
<kwd lng="es"><![CDATA[subproductos piña]]></kwd>
<kwd lng="es"><![CDATA[aditivos para piña]]></kwd>
<kwd lng="es"><![CDATA[ensilaje]]></kwd>
<kwd lng="en"><![CDATA[forage preservation]]></kwd>
<kwd lng="en"><![CDATA[ruminant nutrition]]></kwd>
<kwd lng="en"><![CDATA[pineapple byproducts]]></kwd>
<kwd lng="en"><![CDATA[pineapple additives, silage]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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