<?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>S2007-09342015000801807</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Eficiencia fisiológica de N, P, K y Mg en maíces H-47 y H-59]]></article-title>
<article-title xml:lang="en"><![CDATA[Physiological efficiency of N, P, K and Mg in maize H-47 and H-59]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zamudio-González]]></surname>
<given-names><![CDATA[Benjamín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tadeo-Robledo]]></surname>
<given-names><![CDATA[Margarita]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa-Calderón]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Rodríguez]]></surname>
<given-names><![CDATA[Juan Nelson]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Celis Euan]]></surname>
<given-names><![CDATA[David Israel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Turrent Fernández]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdivia Bernal]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP Sitio Experimental Metepec ]]></institution>
<addr-line><![CDATA[Zinacantepec México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNAM Facultad de Estudios Superiores Cuautitlán ]]></institution>
<addr-line><![CDATA[ México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Nayarit  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>6</volume>
<numero>8</numero>
<fpage>1807</fpage>
<lpage>1818</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342015000801807&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342015000801807&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342015000801807&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La baja eficacia del uso de fertilizantes en suelos agrícolas impacta negativamente en la productividad y sustentabilidad de los sistemas de producción. Se calcularon los índices de la eficiencia fisiológica aparente (EFA) de diferentes tratamientos de fertilización al suelo para los híbridos H-47 y H-59. La EFA de un nutrimento es el cociente de los kg de grano cosechado por kg de N, P, K o Mg en la biomasa del cultivo para una hectárea. Se utilizó un factorial completo de cinco híbridos por ocho tratamientos de fertilización bajo el concepto de "parcelas de omisión", modalidad de la Ley del Mínimo de Leibniz. La fórmula "completa y suficiente" en kg ha-1 para cosechar al menos 10 t ha-1 de grano de maíz fue: 240N-90P2O5-80K2O-60S-50MgO-380CaO (T8). Con la sucesiva omisión de un macro nutrimento se obtuvieron: T1 (-N), T2 (-P), T3 (-K), T4 (-S), T5 (-Mg), T6 (-Ca) y T7 ("agricultor" con 70% de la dosis de NPK de "dosis completa"; pero sin S, Mg y Ca). Se sembró con 90 mil semillas por hectárea en suelo con "punta de riego" el 13 de mayo. Características de mazorca y cosecha se midieron por cuadriplicado. Con los contenidos de macro nutrimentos en biomasa y producción de grano de H-47 y H-59 se calcularon las EFA,s de tratamientos de omisión de N, P, K y Mg. Las variables se analizaron con SAS y se separaron las medias con prueba de Tukey al 5%. Las EFA, s del conjunto de los tratamientos de fertilización fueron: para H-47 de 33.6/N, 232.4/P, 51.7/K y 553.4/Mg; y para H-59 de 39.0/N, 181.1/P, 67.1/K y 421.8/Mg. Los valores de EFA cambian más asociado a genotipo en comparación a la omisión de algún macro nutrimento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The low efficiency of fertilizer use in agricultural soils negatively impacts productivity and sustainability of production systems. Rates of apparent physiological efficiency (EFA) were calculated regarding different fertilization treatments on the soil for hybrid H-47 and H-59. The EFA of a nutrient is the ratio of grain harvested in kg per kg of N, P, K or Mg in the crop's biomass for one hectare. We used a full factorial of five hybrid for eight fertilization treatments under the concept of "omission plot", a mode of minimum act by Leibniz. The "complete and sufficient" formula in kg ha-1 to harvest at least 10 t ha-1 of maize grain was: 240N-90P2O5-80K2O-60S-50MgO-380CaO (T8 ). With the successive omission of a macro nutrient we obtained: T1 (-N), T2 (-P), T3 (-K), T4 (-S), T5 (-Mg), T6 (-Ca) and T7 ("farmer" with 70% NPK dose of "full dose", but without S, Mg and Ca). Sowing with 90 thousand seeds per hectare in soil with "irrigation tip" on May 13th. Cobs and crop characteristics were measured in quadruplicate. With the contents of macro nutrient and biomass production of grain H-47 and H-59, calculating EFA, of treatments omission of N, P, K and Mg. The variables were analysed with SAS, separating the means by Tukey 5% test. The EFA, of all the fertility treatments were: for H-47 de 33.6/N, 232.4/P, 51.7/K and 553.4/Mg and for H-59 de 39.0/N, 181.1/P, 67.1/K and 421.8/Mg. EFA values change more associated with the genotype compared to omission of some macro nutrients.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[maíz (Zea mays L.)]]></kwd>
<kwd lng="es"><![CDATA[eficiencia de fertilización]]></kwd>
<kwd lng="es"><![CDATA[nutrición vegetal]]></kwd>
<kwd lng="en"><![CDATA[maize (Zea mays L.)]]></kwd>
<kwd lng="en"><![CDATA[fertilization efficiency]]></kwd>
<kwd lng="en"><![CDATA[plant nutrition]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Better crops with plant food]]></source>
<year>2011</year>
<volume>95</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>4-6</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
