<?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>S2079-34802020000400547</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Voluntary intake and ruminal pH as fermentation indicators in sheep fed a lactic probiotic]]></article-title>
<article-title xml:lang="es"><![CDATA[Consumo voluntario y pH ruminal, como indicador de la fermentación en corderos alimentados con un probiótico láctico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez González]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Borroto Torriente]]></surname>
<given-names><![CDATA[H.]]></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>
<aff id="Af2">
<institution><![CDATA[,Universidad Agraria de la Habana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>54</volume>
<numero>4</numero>
<fpage>547</fpage>
<lpage>556</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2079-34802020000400547&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2079-34802020000400547&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2079-34802020000400547&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract To evaluate the effect of a lactic probiotic on voluntary intake and pH performance in sheep, four Pelibuey animals were used, distributed in a Latin square design (4x4). With an average live weight of 20.75 ± 0.84 kg, they were housed in individual metabolism cages for four periods, 15 days each (10 for adaptation and 5 for sampling), for a total of 60 days. Treatments consisted of the increasing addition (15, 25 and 35 g day-1) of a lactic probiotic to the supplement offered (5 g kg LW-1) on a single occasion during the day (08:30 am), followed by the supply of forage at will. It was demonstrated that dry matter voluntary intake, both absolute (1.16 vs. 1.14 kg, P=0.0011) and relative to metabolic weight (120.37 vs. 118.40 g kg LW 0.75, P=0.0008), benefited the treatment with 15 g d-1 of participation of the probiotic in the diet and control, respectively. Mean ruminal pH values were 6.49 ± 0.18 and showed fluctuations between 6 and 20 h after the initial food ingestion. It is concluded that the minimum level (15 g day-1) of the lactic probiotic in the diet did not affect nutrient intake with respect to control, although superior levels decreased it. This minimum level maintained the ruminal pH, with variations during the frequency of feed administration.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Para evaluar el efecto de un probiótico láctico en el consumo voluntario y el comportamiento del pH ruminal en corderos, se evaluaron cuatro animales de la raza Pelibuey, distribuidos en un diseño cuadrado latino (4x4). Con peso vivo promedio de 20.75 ± 0.84 kg, se alojaron en jaulas individuales de metabolismo, durante cuatro períodos, de 15 días cada uno (10 de adaptación y 5 de muestreo), para un total de 60 días. Los tratamientos consistieron en la adición creciente (15, 25 y 35 g día-1) de un probiótico láctico al suplemento ofertado (5 g kg PV-1) en una sola ocasión durante el día (08:30 am), seguido del suministro del forraje a libre voluntad. Se comprobó que el consumo voluntario de materia seca, tanto absoluto (1.16 vs 1.14 kg, P= 0.0011) como relativo al peso metabólico (120.37 vs 118.40 g kg PV 0.75, P= 0.0008), benefició el tratamiento con 15 g d-1 de participación del probiótico en la dieta y el control, respectivamente. Los valores medios de pH ruminal fueron de 6.49 ± 0.18 y presentaron fluctuaciones entre las 6 y 20 h posteriores a la ingestión inicial del alimento. Se concluye que el nivel mínimo (15 g dia-1) del probiótico láctico en la dieta no afectó el consumo de nutrientes con respecto al control, aunque niveles superiores lo disminuyen. Este nivel mínimo mantuvo el pH ruminal, con variaciones durante la frecuencia de administración del alimento.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[lactic acid bacteria]]></kwd>
<kwd lng="en"><![CDATA[rumen]]></kwd>
<kwd lng="en"><![CDATA[Pelibuey sheep]]></kwd>
<kwd lng="es"><![CDATA[bacterias lácticas]]></kwd>
<kwd lng="es"><![CDATA[rumen]]></kwd>
<kwd lng="es"><![CDATA[ovino Pelibuey]]></kwd>
</kwd-group>
</article-meta>
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