<?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>S2007-09342018000300683</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v9i3.1225</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Crecimiento y extracción nutrimental de nochebuena en respuesta a la relación nitrato:calcio y etapa fenológica]]></article-title>
<article-title xml:lang="en"><![CDATA[Nutritional growth and extraction of poinsettia in response to the ratio nitrate:calcium and phenological stage]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Olivar]]></surname>
<given-names><![CDATA[Vicente]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villegas-Torres]]></surname>
<given-names><![CDATA[Oscar Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdez-Aguilar]]></surname>
<given-names><![CDATA[Luis Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alia-Tejacal]]></surname>
<given-names><![CDATA[Irán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sainz-Aispuro]]></surname>
<given-names><![CDATA[Manuel de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Pérez]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos Facultad de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[Cuernavaca Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro Departamento de Horticultura ]]></institution>
<addr-line><![CDATA[Saltillo Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>3</numero>
<fpage>683</fpage>
<lpage>690</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342018000300683&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342018000300683&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342018000300683&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los requerimientos nutrimentales de las plantas son distintos en sus diferentes etapas fenológicas por lo que en el presente experimento se modificó la solución de Steiner para adaptarla a cada etapa de nochebuena (crecimiento radical, desarrollo vegetativo y pigmentación). Se utilizó el cultivar Prestige, el sustrato fue una mezcla de tierra de hoja, fibra de coco y tezontle rojo en proporción 60:20:20 (%, v/v) y contenedor de polietileno negro de 15.24 cm de diámetro. El experimento se llevó a cabo en la Facultad de Ciencias Agropecuarias de la Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos. Se evaluaron variables morfológicas de las plantas de nochebuena como respuesta a la concentración relativa entre NO3 - y Ca2+ de la solución nutritiva. El suministro de nutrimentos de acuerdo con las etapas fenológicas de la nochebuena afecta el crecimiento, extracción y concentración de nutrimentos, pero depende del régimen nutrimental. El régimen con la concentración (meq L-1) NO3 -:Ca2+ 10:7 en crecimiento radical, 10:9 en desarrollo vegetativo y 12:9 en la etapa de pigmentación indujeron que las plantas de nochebuena presentaran mayor extracción de N, P, K, Ca y Mg, se incrementara la concentración de K y las características morfológicas y la producción de materia seca fueran sobresalientes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The nutrient requirements of the plants are different in their different phenological stages, so in the present experiment the Steiner solution was modified to adapt it to each stage of poinsettia (root growth, vegetative development and pigmentation). The Prestige cultivar was used the substrate was a mixture of leaf soil, coconut fiber and red tezontle in proportion 60:20:20 (%, v/v) and black polyethylene container of 15.24 cm in diameter. The experiment was carried out in the Faculty of Agricultural Sciences of the Autonomous University of the State of Morelos, Cuernavaca, Morelos. Morphological variables of the poinsettia plants were evaluated in response to the relative concentration between NO3 - and Ca2+ of the nutrient solution. The supply of nutrients according to the phenological stages of poinsettia affects the growth, extraction and concentration of nutrients, but depends on the nutritional regime. The regimen with the concentration (in meq L-1) NO3 -:Ca2+ 10:7 in radical growth, 10:9 in vegetative development and 12:9 in the pigmentation stage induced the poinsettias to present greater extraction of N, P, K, Ca and Mg, will increase the concentration of K and the morphological characteristics and the production of dry matter were outstanding.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[conductividad eléctrica]]></kwd>
<kwd lng="es"><![CDATA[fenología]]></kwd>
<kwd lng="es"><![CDATA[nutrimentos]]></kwd>
<kwd lng="es"><![CDATA[solución nutritiva]]></kwd>
<kwd lng="en"><![CDATA[electrical conductivity]]></kwd>
<kwd lng="en"><![CDATA[nutrients]]></kwd>
<kwd lng="en"><![CDATA[nutritive solution]]></kwd>
<kwd lng="en"><![CDATA[phenology]]></kwd>
</kwd-group>
</article-meta>
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