<?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>0258-5936</journal-id>
<journal-title><![CDATA[Cultivos Tropicales]]></journal-title>
<abbrev-journal-title><![CDATA[cultrop]]></abbrev-journal-title>
<issn>0258-5936</issn>
<publisher>
<publisher-name><![CDATA[Ediciones INCA]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0258-59362019000100008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variabilidad del rendimiento en cultivares de soya (Glycine max L.). Parte I. Época de frío]]></article-title>
<article-title xml:lang="en"><![CDATA[Variability of the yield in soybean cultivars (Glycine max L.). Part I. Time of cold]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Roján-Herrera]]></surname>
<given-names><![CDATA[Osmany]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maqueira-López]]></surname>
<given-names><![CDATA[Lázaro A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-de la Noval]]></surname>
<given-names><![CDATA[Walfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Ciencias Agrícolas (INCA)  ]]></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>03</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<volume>40</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0258-59362019000100008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0258-59362019000100008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0258-59362019000100008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La investigación se desarrolló en áreas de la Unidad Científico Tecnológica de Base, Los Palacios, Pinar del Río, perteneciente al Instituto Nacional de Ciencias Agrícolas. Se utilizaron cuatro cultivares de soya (DV-5, DVN-6, DT-84, D-2101), los cuales se sembraron en tres fechas de siembra diferentes (diciembre 2011, enero 2012 y diciembre 2012), correspondientes a la época de frío, sobre un suelo Hidromórfico Gley Nodular Ferruginoso Petroférrico. El objetivo fue evaluar la variabilidad del rendimiento en cultivares de soya (Glycine max (L.) Merrill), asociados a variables meteorológicas según fecha de siembra en la época de frío. Se utilizó un diseño experimental de bloques al azar con tres réplicas, y se evaluó el rendimiento agrícola y sus componentes, además de variables meteorológicas (temperaturas, radiación solar, humedad relativa), en diferentes etapas fenológicas del ciclo del cultivo. Teniendo en cuenta los resultados obtenidos, los mayores valores de rendimiento agrícola se corresponden con los valores más altos de temperatura y radiación solar (diciembre 2012), alcanzando un mejor resultado el cultivar D-2101 con un valor de 2,31 t ha-1. Los componentes más asociados al rendimiento fueron el número de vainas/plantas y el número de granos/plantas para las tres fechas de siembra en general. De las variables climáticas evaluadas, las que más influyeron en las distintas fases fueron la temperatura y la radiación solar.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The research was developed in the areas of the Base Technological Science Unit, Los Palacios, Pinar del Río, belonging to the National Institute of Agricultural Sciences. Four soybean cultivars were used (DV-5, DVN-6, DT-84, D-2101), which were sown on three different sowing dates (December 2011, January 2012 and December 2012), corresponding to the cold season, on a Hydromorphic Gley Nodular Ferruginous Petroferric soil. The objective was to evaluate the variability of yield in soybean cultivars (Glycine max (L.) Merrill), associated to meteorological variables according to date of sowing in the cold season. A randomized block experimental design with three replications was used, and the agricultural yield and its components were evaluated, as well as meteorological variables (temperatures, solar radiation, relative humidity), in different phenological stages of the crop cycle. Taking into account the results obtained, the highest values of agricultural yield correspond to the highest values of temperature and solar radiation (December 2012), reaching a better result the cultivar D-2101 with a value of 2.31 t ha-1. The components most associated with yield were the number of pods / plants and the number of grains / plants for the three planting dates in general. Of the climatic variables evaluated, the ones that most influenced the different phases were temperature and solar radiation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[variables meteorológicas]]></kwd>
<kwd lng="es"><![CDATA[fenología]]></kwd>
<kwd lng="es"><![CDATA[granos]]></kwd>
<kwd lng="en"><![CDATA[meteorological variables]]></kwd>
<kwd lng="en"><![CDATA[phenology]]></kwd>
<kwd lng="en"><![CDATA[grains]]></kwd>
</kwd-group>
</article-meta>
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