<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342016000300599</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Respuesta agronómica y nutrimental de fresa a soluciones nutritivas con diferente relación NH 4 + /NO 3 -]]></article-title>
<article-title xml:lang="en"><![CDATA[Agronomic and nutritional strawberry response to nutrient solutions with different ratio NH 4 + /NO 3 - in the vegetative stage]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos-García]]></surname>
<given-names><![CDATA[Tonatiu]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-García]]></surname>
<given-names><![CDATA[Prometeo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alcántar-González]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calderón-Zavala]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo Edafología]]></institution>
<addr-line><![CDATA[Montecillo Estado de México]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>3</numero>
<fpage>599</fpage>
<lpage>606</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342016000300599&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342016000300599&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342016000300599&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de la presente investigación fue conocer la relación óptima de NH4 +/NO3 - en la solución nutritiva que favorece el comportamiento agronómico y nutrimental de fresa cv. Festival en un sistema intensivo de producción durante la etapa vegetativa-floración. Se evaluaron soluciones nutritivas (SN) con diferente relación NH4 +/NO3: 100/0, 75/25, 50/50, 25/75 y 0/100. A los 108 días después de iniciados los tratamientos (ddit) se evaluaron los siguientes parámetros: área foliar (AF), contenido de materia fresca (MF) y materia seca (MS), acumulación de N-NH4 y N-NO3 (AN) en plantas de fresa. En la etapa vegetativa-floración, la SN con una relación N H4 +/ NO3 - igual a 100/0 incrementó significativamente AF, MF, MS y AN en plantas de fresa cv. Festival, en comparación con los demás tratamientos. Por lo tanto, se sugiere la adición de amonio como única fuente de N para la producción de fresa durante la etapa vegetativa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The aim of this research was to determine the optimal ratio of NH4 +/NO3 - in the nutrient solution that favors the agronomic and nutritional behavior of strawberry cv. festival in an intensive production system during the vegetative- f lowering stage. The nutrient solutions (SN) were evaluated with different relationship NH4 +/NO3: 100/0, 75/25, 50/50, 25/75 and 0/100. At 108 days after initiated treatment (ddit) the following parameters were evaluated in strawberry plants leaf area (AF), content of fresh material (MF) and dry matter (DM) accumulation of N-NH4 y N-NO3 (AN) in the strawberry plants. In the vegetative-f lowering stage, the SN with a NH4 +/NO2 - ratio equal to 100/0 significantly increased AF, MF, MS and AN in strawberry plants cv. festival, compared with other treatments. Therefore, the addition of ammonium as sole N source for the production of strawberry during the vegetative stage is suggested.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fragaria x ananassa Duch.]]></kwd>
<kwd lng="es"><![CDATA[acumulación de N]]></kwd>
<kwd lng="es"><![CDATA[fibra de coco]]></kwd>
<kwd lng="en"><![CDATA[Fragaria x ananassa Duch.]]></kwd>
<kwd lng="en"><![CDATA[accumulation of N]]></kwd>
<kwd lng="en"><![CDATA[coir]]></kwd>
</kwd-group>
</article-meta>
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