<?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>S2007-09342016000501077</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Índice de cosecha con macro-nutrimentos en grano de maíz]]></article-title>
<article-title xml:lang="en"><![CDATA[Harvest index with macro-nutrients in corn grain]]></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[Nelson]]></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-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP  ]]></institution>
<addr-line><![CDATA[Zinacantepec Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNAM Facultad de Estudios Superiores Cuautitlán ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>5</numero>
<fpage>1077</fpage>
<lpage>1089</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342016000501077&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342016000501077&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342016000501077&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En Valles Altos del Estado de México entre 2 200 a 2 700 msnm se tienen bajos rendimientos de maíz con alto riesgo por clima y siembra de criollos con inadecuadas prácticas de manejo. Los años 2009, 2010 y 2011 (A1, 2, 3) se evaluó la siembra del híbrido H-51 AE en campo con dos densidades (D1= 65 mil y D2= 85 000 plantas ha-1) y tres secuencias anuales de nitrógeno (Ni) al suelo (con N siempre N1= N-N-N, primer año sin nitrógeno N2= 0-N-N y sin N los tres años N3= 0-0-0) y dos dosis de N (N= 300 y N=1 80 kg ha-1). La combinación de factores 2Di*3Ni= 6 tratamientos, donde: T1= D1*N1, T2=D1*N2, T3=D1*N3, T4=D2*N1, T5=D2*N2 y T6=D2*N3. Cada año se adicionó en kg ha-1 de P2O5, K2O, MgO, S y Zn a los tratamientos del T1 al T3 con 0-90-90-44-50-3; y del T4 al T2 con 0-45-45-0-0-0. La prueba se ubicó en las coordenadas 19º 34&#8217; 23.28&#8221; latitud norte y 99º46&#8217; 25.62&#8221; longitud oeste con altitud de 2 628 msnm. Se pesaron la producción de grano, forraje y olote; y los contenidos de macro-nutrimentos para calcular sus índices de cosecha (IC) en grano de maíz por efecto de años, densidades y secuencias de N. Los contenidos totales de cinco macro elementos en kg ha-1 en la biomasa total de maíz en promedio de tres años, fueron: 187.9 de N, 30.6 de P, 69.9 de K, 24.1 de Mg y 11.6 de S. Los índices de cosecha de estos elementos en el grano de maíz fueron: ICN= ICN= 0.45, ICP=0.75, ICK= 0.21, ICMg= 0.45 e ICS=0.43. Existió correlación (R2) positiva de producción de grano con biomasa y contenidos [N/ P y Mg]; así como de la biomasa con contenidos [N/P/K y S]. Se justificó aumentar la densidad de siembra pero &#8220;alta&#8221; fertilización de N al suelo no es rentable en condiciones de mal clima.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In the Highland valleys in Mexico State between 2 200 to 2 700 meters above sea level have low maize yields at high risk for climate and planting native with inadequate management practices. The years 2009, 2010 and 2011 (A1, 2,3) was evaluated planting of hybrid H-51 AE field with two densities (D1= 65K and D= 85 000 plants ha-1) and three annual sequences nitrogen (Ni) to the ground (with N always N1= N-N-N, the first year without nitrogen N2= 0-N-N and without three years N3= 0-0-0) and two doses of N (N= 300 and N= 1 80 kg ha-1). The combination of factors 2Di*3Ni= 6 treatments where:T1= D1*N1, T2=D1*N2, T3=D1*N3, T4=D2*N1, T5=D2*N2 and T6=D2*N3. Each year was added in kg ha-1 of P2O5, K2O, MgO, S and Zn treatments T1 to T3 with 0-90-90-44-50-3; and T4 to T6 with 0-45-45-0-0-0. The test was located at coordinates 19º 34&#8217; 23.28&#8221; north latitude and 99º46&#8217; 25.62&#8221; west longitude with altitude of 2 628 meters. The production of grain, forage and cob weighed; and the contents of macronutrients to estimate their harvest (IC) in corn grain effect of years, densities and sequences of N. The total contents of five macro-elements in kg ha-1 in the total biomass of corn average three years were: 187.9 of N, 30.6 of P, 69.9 of K, 24.1 of Mg and 11.6 of S. The index harvest of these elements in corn grain were: 0.45, ICP=0.75, ICK= 0.21, ICMg= 0.45 and ICS=0.43. There was correlation (R2) positive grain production and biomass content [N/P and Mg]; and content of biomass [N/P/K and S]. It was justified increase planting density but "high" fertilization N of the ground is not profitable in bad weather.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[densidad de siembra]]></kwd>
<kwd lng="es"><![CDATA[eficiencia de uso de N]]></kwd>
<kwd lng="es"><![CDATA[maíz]]></kwd>
<kwd lng="es"><![CDATA[nutrición vegetal]]></kwd>
<kwd lng="en"><![CDATA[density]]></kwd>
<kwd lng="en"><![CDATA[corn]]></kwd>
<kwd lng="en"><![CDATA[N use efficiency]]></kwd>
<kwd lng="en"><![CDATA[vegetable nutrition]]></kwd>
</kwd-group>
</article-meta>
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