<?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>S2079-34802019000300249</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of the enzymatic hydrolyzate of Saccharomyces cerevisiae yeast on the kinetics of ruminal degradation of nutrients of Cenchrus purpureus cv. OM - 22 (Cenchrus purpureus x Cenchrus americanus) forage]]></article-title>
<article-title xml:lang="es"><![CDATA[Efecto del hidrolizado enzimático de levadura Saccharomyces cerevisiae en la cinética de degradación ruminal de nutrientes del forraje de Cenchrus purpureus vc. OM - 22 (Cenchrus purpureus x Cenchrus americanus)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valenciaga Gutiérrez]]></surname>
<given-names><![CDATA[Daiky]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Álvarez]]></surname>
<given-names><![CDATA[José Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado García]]></surname>
<given-names><![CDATA[Álvaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galindo Blanco]]></surname>
<given-names><![CDATA[Juana Luz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera Villafranca]]></surname>
<given-names><![CDATA[Magaly]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monteagudo]]></surname>
<given-names><![CDATA[Fidel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Ciencia Animal  ]]></institution>
<addr-line><![CDATA[San José de Las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<volume>53</volume>
<numero>3</numero>
<fpage>249</fpage>
<lpage>262</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2079-34802019000300249&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2079-34802019000300249&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2079-34802019000300249&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In order to determine the effect of the enzymatic hydrolyzate of Sacharomyces cerevisiae yeast on the kinetics of rumen degradation of nutrients of Cenchrus purpureus cv. OM - 22from the forage of, four Holstein cows were used, cannulated in rumen which intake fresh forage at will and commercial concentrate, offered once a day, according to a 4 x 4 Latin square design. The treatments were: Control (forage + 2 kg commercial concentrate) and treatments 2, 3 and 4 (forage + 2 kg commercial concentrate + 50 mL, 100 mL or 150 mL of hydrolyzate.kg of concentrate.day-1, respectively). The best use of the forage was obtained in the treatment with 150 mL of hydrolyzate, with the maximum degradation (P &lt;0.0001) of the DM, OM, NDF and ADF in all incubation time. However, after 48 hours it did not differ from the treatment with 100 mL of hydrolyzate. There was a tendency to increase fraction B, the potential degradability and the degradation rate of nutrients, with the increase in the amount of hydrolyzate in the diet. An increase in the ruminal Effective Degradability was observed, which fluctuated between 41.44 and 56.44 % for the DM of the evaluated forage, between 38.87 and 56.70 % for the OM, 33.55 and 48.92 % for the NDF and 25.79 and 44.44 % for the ADF. It is concluded that the addition of the hydrolyzate had a positive effect on the kinetics of ruminal degradation of the forage. It is recommended the use of 100 mL level of enzymatic hydrolyzate. kg of concentrate. day-1 in ruminants which consume diets with high fiber content.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Con el objetivo de determinar el efecto del hidrolizado enzimático de levadura Sacharomyces cerevisiae en la cinética de degradación ruminal de nutrientes del forraje de Cenchrus purpureus vc. OM - 22, se utilizaron cuatro vacas Holstein, canuladas en rumen que consumieron forraje fresco a voluntad y concentrado comercial, según tratamiento, ofrecidos una vez al día, según diseño cuadrado latino 4 x 4. Los tratamientos fueron: Control (forraje + 2 kg concentrado comercial) y tratamientos 2, 3 y 4 (forraje + 2 kg concentrado comercial + 50 mL, 100 mL o 150 mL de hidrolizado.kg de concentrado.día-1, respectivamente). El mayor aprovechamiento del forraje se obtuvo en el tratamiento con 150 mL de hidrolizado, con la degradación máxima (P&lt;0.0001) de la MS, MO, FDN y FDA en todos los horarios de incubación. Sin embargo, a partir de las 48 horas no difirió del tratamiento con 100 mL de hidrolizado. Hubo tendencia al incremento de la fracción B, la degradabilidad potencial y la tasa de degradación de los nutrientes, con el aumento de la cantidad de hidrolizado en la dieta. Se observó incremento de la degradabilidad efectiva ruminal, que fluctuó entre 41.44 y 56.44 % para la MS del forraje evaluado, entre 38.87 y 56.70% para la MO, 33.55 y 48.92 % para la FDN y 25.79 y 44.44 % para la FDA. Se concluye que la adición del hidrolizado tuvo efecto positivo en la cinética de degradación ruminal del forraje. Se recomienda la utilización de 100 mL de hidrolizado enzimático. kg de concentrado. día-1 en rumiantes que consumen dietas con alto contenido de fibra.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[zootechnical additive]]></kwd>
<kwd lng="en"><![CDATA[degradation rate]]></kwd>
<kwd lng="en"><![CDATA[ruminal degradability]]></kwd>
<kwd lng="en"><![CDATA[fibrous diet]]></kwd>
<kwd lng="es"><![CDATA[aditivo zootécnico]]></kwd>
<kwd lng="es"><![CDATA[tasa de degradación]]></kwd>
<kwd lng="es"><![CDATA[degradabilidad ruminal]]></kwd>
<kwd lng="es"><![CDATA[dieta fibrosa]]></kwd>
</kwd-group>
</article-meta>
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