<?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>0120-0690</journal-id>
<journal-title><![CDATA[Revista Colombiana de Ciencias Pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Colom Cienc Pecua]]></abbrev-journal-title>
<issn>0120-0690</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ciencias Agrarias, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-06902020000300182</article-id>
<article-id pub-id-type="doi">10.17533/udea.rccp.v33n3a02</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Fermentative characteristics and nutritional value of sugarcane silage added with two types of urea]]></article-title>
<article-title xml:lang="es"><![CDATA[Características fermentativas y valor nutricional del ensilaje de caña de azúcar con adición de dos tipos de urea]]></article-title>
<article-title xml:lang="pt"><![CDATA[Características fermentativas e valor nutricional da silagem de cana-de-açúcar aditivada com dois tipos de ureia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sousa-Alves]]></surname>
<given-names><![CDATA[Wagner]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rigueira]]></surname>
<given-names><![CDATA[João-Paulo S]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almeida-Moura]]></surname>
<given-names><![CDATA[Marielly M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de-Jesus]]></surname>
<given-names><![CDATA[Diego L S]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monção]]></surname>
<given-names><![CDATA[Flávio P]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[R Rocha-Júnior]]></surname>
<given-names><![CDATA[Vicente]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aspiazú]]></surname>
<given-names><![CDATA[Ignácio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de-Jesus]]></surname>
<given-names><![CDATA[Nathália G]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de-Melo]]></surname>
<given-names><![CDATA[Jozélia A R]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[da-Silva]]></surname>
<given-names><![CDATA[Marcos F P]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Estadual de Montes Claros  ]]></institution>
<addr-line><![CDATA[Janaúba ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Estadual de Montes Claros  ]]></institution>
<addr-line><![CDATA[Janaúba ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Estadual de Montes Claros  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade Estadual de Montes Claros  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>33</volume>
<numero>3</numero>
<fpage>182</fpage>
<lpage>194</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-06902020000300182&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-06902020000300182&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-06902020000300182&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Dry matter (DM) loss is high in sugarcane silage due to its high content of soluble carbohydrates which favors yeast growth and ethanol production, thus reducing the nutritional value of the preserved forage.  Objective: To determine the effect of adding two types of urea at two concentration levels to sugarcane silage on the nutritional value and fermentative characteristics of the silage.  Methods: A completely randomized 2×2+1 factorial design was used, based on two types of urea (conventional and protected), two urea concentration (0.5 and 1.0% of the natural matter), and a control (sugarcane silage with no additives). Six replicates were used. The mixture was placed in PVC silos and opened after 60 days.  Results: There was no difference in DM content or effluent losses by the addition of urea. In regards to neutral detergent fiber, acid detergent fiber, and lignin, decreased levels were observed compared to the control, regardless of urea type. Urea type and concentration had an effect on ammoniacal nitrogen content, with higher values for conventional urea, but not affecting the pH. The addition of urea to sugarcane silage reduced gas losses and raised the levels of crude protein, ether extract, and effective degradability.  Conclusion: Adding protected or conventional urea at 1% of natural matter at the time of sugarcane ensiling reduces gas losses and improves nutritional composition of the silage.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: La caña de azúcar ensilada presenta una elevada pérdida de materia seca (MS) debido a su alto contenido de carbohidratos solubles que favorece el crecimiento de levaduras y la producción de etanol, reduciendo así el valor nutricional del ensilado.  Objetivo: Determinar el efecto de dos tipos de urea en dos concentraciones sobre las características fermentativas y el valor nutricional del ensilaje de caña de azúcar.  Métodos: Se utilizó un diseño completamente al azar, en esquema factorial 2x2+1, basado en dos tipos de urea (común o protegida), dos concentraciones de urea (0,5 y 1,0% de la materia natural) y un control (ensilaje de caña de azúcar sin aditivos). Se utilizaron seis réplicas de cada tratamiento. El material fue ensilado en silos de PVC, los que fueron abiertos después de 60 días.  Resultados: No hubo diferencia en el contenido de MS o en las pérdidas por efluentes con la adición de urea. En relación a la fibra detergente neutra, fibra detergente ácida y lignina, se observó disminución de éstos con respecto al control, independientemente del tipo de urea. Se observó un efecto de la concentración y del tipo de urea para el contenido de nitrógeno amoniacal, con mayores valores para la urea común, pero sin efecto sobre el pH. La adición de urea en el ensilado de caña redujo las pérdidas por gases y elevó los niveles de proteína bruta, extracto etéreo y degradabilidad efectiva.  Conclusión: La adición de urea común o protegida, al 1% de materia natural, al inicio del ensilaje de caña de azúcar reduce las pérdidas por gases y mejora la composición nutricional del ensilaje.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Antecedentes: A ensilagem de cana-de-açúcar sem aditivos apresenta elevada perda de matéria seca (MS) devido ao alto teor de carboidratos solúveis, favorecendo o crescimento de leveduras e produção de etanol, reduzindo assim o valor nutricional da forragem conservada.  Objetivo: Determinar o efeito do tipo de ureia (comun ou protegida) e diferentes concentrações nas características fermentativas e valor nutritivo das silagens de cana-de-açúcar.  Métodos: Utilizou-se um delineamento inteiramente casualizado em esquema fatorial 2 x 2 + 1, sendo dois tipos de ureia (comun ou protegida), e duas concentrações (0,5 e 1,0% com base na matéria natural) mais o controle (silagem exclusiva de cana-de-açúcar); com seis repetições. O material foi ensilado em silos de PVC e abertos após 60 dias.  Resultados: Não houve diferença no teor de MS e nas perdas por efluentes com adição da ureia. Em relação à fibra em detergente neutro, fibra em detergente ácido e lignina observou-se diminuição destes em relação ao controle, independente do tipo de ureia. Observou-se efeito das concentrações e do tipo de ureia para o teor de nitrogênio amoniacal, com maiores valores para a ureia comum, porém sem efeito no pH. A adição de ureia na ensilagem de cana reduziram as perdas por gases e elevaram os teores de proteína bruta, extrato etéreo e degradabilidade efetiva.  Conclusão: O uso de 1% de ureia, independente do tipo, promove um incremento no valor nutricional da silagem de cana-de-açúcar e reduz as perdas por gases.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[conservation]]></kwd>
<kwd lng="en"><![CDATA[ensilage]]></kwd>
<kwd lng="en"><![CDATA[fermentation]]></kwd>
<kwd lng="en"><![CDATA[forage]]></kwd>
<kwd lng="en"><![CDATA[fiber]]></kwd>
<kwd lng="en"><![CDATA[losses]]></kwd>
<kwd lng="en"><![CDATA[protein]]></kwd>
<kwd lng="en"><![CDATA[rumen degradability]]></kwd>
<kwd lng="en"><![CDATA[ruminant]]></kwd>
<kwd lng="en"><![CDATA[sugarcane]]></kwd>
<kwd lng="en"><![CDATA[silage]]></kwd>
<kwd lng="en"><![CDATA[urea]]></kwd>
<kwd lng="es"><![CDATA[caña de azúcar]]></kwd>
<kwd lng="es"><![CDATA[conservación]]></kwd>
<kwd lng="es"><![CDATA[degradabilidad ruminal]]></kwd>
<kwd lng="es"><![CDATA[ensilado]]></kwd>
<kwd lng="es"><![CDATA[ensilaje]]></kwd>
<kwd lng="es"><![CDATA[fermentación]]></kwd>
<kwd lng="es"><![CDATA[fibra]]></kwd>
<kwd lng="es"><![CDATA[forraje]]></kwd>
<kwd lng="es"><![CDATA[pérdidas]]></kwd>
<kwd lng="es"><![CDATA[proteína]]></kwd>
<kwd lng="es"><![CDATA[rumiante]]></kwd>
<kwd lng="es"><![CDATA[urea]]></kwd>
<kwd lng="pt"><![CDATA[cana-de-açúcar]]></kwd>
<kwd lng="pt"><![CDATA[conservação]]></kwd>
<kwd lng="pt"><![CDATA[degradabilidade ruminal]]></kwd>
<kwd lng="pt"><![CDATA[ensilagem]]></kwd>
<kwd lng="pt"><![CDATA[fermentação]]></kwd>
<kwd lng="pt"><![CDATA[fibra]]></kwd>
<kwd lng="pt"><![CDATA[foragem]]></kwd>
<kwd lng="pt"><![CDATA[perdas]]></kwd>
<kwd lng="pt"><![CDATA[proteína]]></kwd>
<kwd lng="pt"><![CDATA[ruminante]]></kwd>
<kwd lng="pt"><![CDATA[uréia]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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