<?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>0253-5785</journal-id>
<journal-title><![CDATA[Centro Agrícola]]></journal-title>
<abbrev-journal-title><![CDATA[Ctro. Agr.]]></abbrev-journal-title>
<issn>0253-5785</issn>
<publisher>
<publisher-name><![CDATA[Editorial Feijóo, Universidad Central de Las Villas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0253-57852021000100028</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Densidades de plantas adecuadas para incrementar el rendimiento agrícola del arroz]]></article-title>
<article-title xml:lang="en"><![CDATA[Adequate plant densities to increase agricultural rice yield]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calero Hurtado]]></surname>
<given-names><![CDATA[Alexander]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Díaz]]></surname>
<given-names><![CDATA[Yanery]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintero Rodríguez]]></surname>
<given-names><![CDATA[Elieni]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Pardo Hurtado]]></surname>
<given-names><![CDATA[Yainier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Estadual Paulista &#8220;Júlio de Mesquita Filho&#8221; (UNESP)  ]]></institution>
<addr-line><![CDATA[Jaboticabal São Paulo]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro Universitario Municipal de Taguasco &#8220;Enrique José Varona&#8221;  ]]></institution>
<addr-line><![CDATA[Taguasco Sancti Spíritus]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Empresa Agropecuaria Agroindustrial &#8220;Melanio Hernández&#8221;  ]]></institution>
<addr-line><![CDATA[Taguasco Sancti Spíritus]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Sancti Spíritus &#8220;José Martí Pérez&#8221; (UNISS)  ]]></institution>
<addr-line><![CDATA[ Sancti Spíritus]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>48</volume>
<numero>1</numero>
<fpage>28</fpage>
<lpage>36</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0253-57852021000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0253-57852021000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0253-57852021000100028&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las densidades adecuadas de plantas puede ser un factor clave e importante para incrementar la productividad del arroz (Oryza sativa L.). Por tanto, el objetivo de este estudio fue investigar la influencia de cuatro densidades de población (DP) en el crecimiento y la producción agrícola del arroz. El cultivar INCA-LP-5 fue manejado entre abril y agosto de 2016. Los tratamientos fueron distribuidos en un diseño en bloques al azar, con cuatro densidades de población (250000, 350000, 450000 y 550000 plantas ha-1) y cinco réplicas. Los efectos de las DP se verificaron mediante la observación de los siguientes parámetros: altura de la planta (cm), número hijos por plantón, número de panículas por metro cuadrado, número de semillas por panícula, longitud de la panícula, masa de 1000 semillas (g) y el rendimiento (t ha-1). Los resultados indicaron que la DP de 450000 plantas ha-1 mostró los mejores resultados en la productividad del arroz, porque incrementó el rendimiento agrícola en 0,70 t ha-1 al compararlo con las densidades 350000 y 550000 y 1,94 t ha-1 respecto a la menor densidad. Estos resultados fueron posibles porque la DP de 450000 plantas ha-1 incrementó los parámetros morfológicos y productivos, relativos a las otras densidades estudiadas. Los hallazgos de este estudio indicaron que la utilización de densidades óptimas de plantas desempeña un rol fundamental en el crecimiento y la productividad del arroz, lo cual conduce a un desarrollo sostenible del cultivo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The use of adequate plant densities can be a key and important factor to increasing rice productivity (Oryza sativa L.). Therefore, the objective of this study was to investigate the influence of four population densities (DP) on the growth and agricultural production of rice. The INCA-LP-5 cultivar was managed between April and August 2016. The treatments were distributed in a randomized block design, with four population densities (250,000, 350,000, 450,000 and 550,000 plants ha-1) and five replications. The effects of the PD were verified by observing the following parameters: evaluated the following indicators, plant height (cm), tiller number per hill, number of panicles per m2, number of grains per panicle, panicle length (cm), 1000 grains weight (g) and grain yield (t ha-1). The results indicated that the DP of 450,000 plant ha-1 showed the best results in rice productivity. These results were possible because the DP of 450,000 plants ha-1 increased the morphological and productive parameters in relation to the other densities studied. The findings of this study indicated that the use of optimal plant densities plays a fundamental role in the growth and productivity of rice, which leads to a sustainable development of the crop.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[cultivar]]></kwd>
<kwd lng="es"><![CDATA[distancia de plantación]]></kwd>
<kwd lng="es"><![CDATA[Oryza sativa L.]]></kwd>
<kwd lng="es"><![CDATA[rendimiento]]></kwd>
<kwd lng="en"><![CDATA[cultivar]]></kwd>
<kwd lng="en"><![CDATA[sowing densities]]></kwd>
<kwd lng="en"><![CDATA[Oryza sativa L.]]></kwd>
<kwd lng="en"><![CDATA[yield]]></kwd>
</kwd-group>
</article-meta>
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