<?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>S2079-34802020000400503</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Analysis of factors influencing productivity of two dairy farms in Sancti Spíritus, Cuba]]></article-title>
<article-title xml:lang="es"><![CDATA[Análisis de los factores que influyen en la productividad de dos unidades lecheras en Sancti Spíritus, Cuba]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[Verena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[March]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[Y.]]></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[,Delegación Provincial del Ministerio de la Agricultura (MINAG)  ]]></institution>
<addr-line><![CDATA[ Sancti Spíritus]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Sancti Spíritus (UNISS) José Martí Pérez Facultad Agropecuaria Departamento de Veterinaria]]></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>503</fpage>
<lpage>513</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2079-34802020000400503&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2079-34802020000400503&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2079-34802020000400503&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Resumen The study was carried out in two dairy farms of Dos Ríos enterprise, during 2015 and 2016, in order to identify the main factors that influence dairy production. In the analysis, ten variables with the highest preponderance were identified, grouped into four principal components (PC), which explained 79.6% of the variance. As a result of cluster analysis, four groups were formed, which respond, in a general sense, to each dairy farm at every season. Impact factors of each combination, principal component vs. group, were identified. The production (PC1) in dry period showed values of -0.257 and -0.815, for farms 16 and 17, respectively, related to the high stocking rate and low proportion of biomass bank in dairy 17. Herd (PC2) showed a negative impact on farm 16, due to the low number of animals that it uses with respect to dairy 17. Reproduction (PC3) presented a negative impact in both units, which was very similar during rainy season. This phenomenon indicates a greater number of births in dry season, which is not suitable in tropical exploitation systems based on pastures and forages. Milk quality (PC4) showed negative values in farm 16 during rainy season, due to mastitis. The results allowed to assess the factors with the greatest impact, average by groups and PC, and made it possible to identify, with certainty, the difficulties in the production system, so that strategies could be implemented to minimize or eliminate them.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El estudio se realizó en dos lecherías de la unidad empresarial de base Dos Ríos, durante 2015 y 2016, con el propósito de identificar los principales factores que influyen en la producción láctea. En el análisis se identificaron diez variables con mayor preponderancia, agrupadas en cuatro componentes principales (CP), que explicaron 79.6 % de la varianza. Como resultado del análisis de cluster, se conformaron cuatro grupos, que responden en sentido general a cada vaquería en cada época del año. Se identificaron los factores de impacto de cada combinación, componente principal vs grupo. La producción (CP1) en el período poco lluvioso mostró valores de -0.257 y -0.815, para las unidades 16 y 17, respectivamente, relacionados con la alta carga y baja proporción del banco de biomasa en la vaquería 17. El rebaño (CP2) mostró impacto negativo en la unidad 16, por el menor número de animales que explota con respecto a la vaquería 17. La reproducción (CP3) presentó en ambas unidades impacto negativo, que fue muy similar en el período lluvioso. Este fenómeno indica mayor cantidad de nacimientos en la época poco lluviosa, lo que no es conveniente en los sistemas de explotación tropical basados en pastos y forrajes. La calidad láctea (CP4) mostró valores negativos en la unidad 16 en la época lluviosa, debido a las situaciones de mastitis. Los resultados permitieron valorar los factores de mayor impacto, promedio por grupos y CP, y posibilitaron identificar con certeza las dificultades en el sistema productivo, de modo que se puedan trazar estrategias que las minimicen o eliminen.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[forage balance]]></kwd>
<kwd lng="en"><![CDATA[impact]]></kwd>
<kwd lng="en"><![CDATA[intake]]></kwd>
<kwd lng="en"><![CDATA[pasture]]></kwd>
<kwd lng="es"><![CDATA[balance forrajero]]></kwd>
<kwd lng="es"><![CDATA[impacto]]></kwd>
<kwd lng="es"><![CDATA[consumo]]></kwd>
<kwd lng="es"><![CDATA[pasto]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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