<?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>S0258-59362020000400007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la aspersión foliar de quitosano en el desarrollo vegetativo de soya inoculada]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of chitosan foliar spray on the vegetative development of inoculated soybean]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costales-Menéndez]]></surname>
<given-names><![CDATA[Daimy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Falcón-Rodríguez]]></surname>
<given-names><![CDATA[Alejandro B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Domínguez]]></surname>
<given-names><![CDATA[Richard]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Capdevila-Valera]]></surname>
<given-names><![CDATA[José Zenón]]></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>
<aff id="Af2">
<institution><![CDATA[,Instituto de Pastos y Forrajes  ]]></institution>
<addr-line><![CDATA[Boyeros La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Nacional de Sanidad Agropecuaria (CENSA)  ]]></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>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>41</volume>
<numero>4</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0258-59362020000400007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0258-59362020000400007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0258-59362020000400007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El quitosano es un polímero lineal de glucosaminas unidas por enlaces &#946; 1-4, que se obtiene por desacetilación alcalina de quitina y tiene una amplia aplicación como bioestimulante agrícola. El objetivo del presente trabajo fue evaluar el efecto de diferentes concentraciones (1, 10, 50, 100, 500 y 1000 mg L-1) de quitosano, aplicadas en las etapas V1 y V2 por aspersión foliar, en indicadores de la nodulación, la fisiología y el crecimiento vegetativo de soya cv IS-27 inoculada con Azofert-S®, en condiciones controladas. Semillas inoculadas con la cepa Bradyrhizobium elkanii ICA 8001, previo a la siembra, se colocaron en macetas y fueron cultivadas en cámara de crecimiento hasta la fase V4. La aplicación de 10 mg L-1 de quitosano estimuló, tanto el número como la masa seca de los nódulos formados y las concentraciones 500 y 1000 mg L-1, estimularon el crecimiento de las plantas. Por otra parte, la inoculación de semillas con Bradyrhizobium aumentó los niveles de la actividad enzimática nitrato reductasa (NR) en la fase V1 de soya, mientras que en las etapas V2 y V3-V4, la actividad NR fue incrementada con la aplicación de las concentraciones entre 10 y 500 mg L-1 de quitosano. El beneficio de los indicadores del metabolismo del nitrógeno por el quitosano en este trabajo podría estar vinculado al desarrollo vegetativo estimulado en las plantas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Chitosan is a linear polymer of glucosamines linked by &#946; 1-4 exoskeleton, which is obtained by alkaline deacetylation of chitin and, has a wide application as an agricultural biostimulant. The objective of this work was to evaluate the effect of different concentrations (1, 10, 50, 100, 500 and 1000 mg L-1) of chitosan, applied in phases V1 and V2 by foliar spray, in the nodulation, the physiology and vegetative growth indicators of IS-27 inoculated soybean with Azofert-S®, in controlled conditions. Seeds inoculated with the ICA 8001 strain of Bradyrhizobium elkanii, prior to sowing, were placed in pots and grown in a growth chamber until phase V4. The application of 10 mg L-1 chitosan stimulated both the number and the dry mass of the nodules formed and the concentrations 500 and 1000 mg L-1 stimulated plant growth. On the other hand, the inoculation of seeds with Bradyrhizobium increased the levels of the nitrate reductase (NR) enzyme activity in the V1 soybean phase, while in the V2 and V3-V4 phases, the NR activity was increased with the application of the concentrations between 10 and 500 mg L-1 chitosan. The benefit of the indicators of the metabolism of nitrogen by chitosan in this work could be to the stimulated vegetative development in plants related.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biostimulantes]]></kwd>
<kwd lng="es"><![CDATA[Bradyrhizobium]]></kwd>
<kwd lng="es"><![CDATA[concentración]]></kwd>
<kwd lng="es"><![CDATA[crecimiento]]></kwd>
<kwd lng="es"><![CDATA[nitrógeno]]></kwd>
<kwd lng="en"><![CDATA[biostimulants]]></kwd>
<kwd lng="en"><![CDATA[Bradyrhizobium]]></kwd>
<kwd lng="en"><![CDATA[concentration]]></kwd>
<kwd lng="en"><![CDATA[growth]]></kwd>
<kwd lng="en"><![CDATA[nitrogen]]></kwd>
</kwd-group>
</article-meta>
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