<?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>2007-4018</journal-id>
<journal-title><![CDATA[Revista Chapingo serie ciencias forestales y del ambiente]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo ser. cienc. for. ambient]]></abbrev-journal-title>
<issn>2007-4018</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo, Coordinación de Revistas Institucionales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40182007000200085</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[APLICACIÓN DE FERTILIZANTES SINTÉTICOS O ABONOS VERDES Y SU EFECTO SOBRE LA CANTIDAD DE NITRATO RESIDUAL EN EL SUELO]]></article-title>
<article-title xml:lang="en"><![CDATA[APPLICATION OF SYNTHETIC FERTILIZERS OR GREEN MANURE AND THEIR EFFECT ON THE AMOUNT OF RESIDUAL NITRATE IN SOIL]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arévalo-Galarza]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Mendoza]]></surname>
<given-names><![CDATA[T. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salcedo-Pérez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galvis-Spinola]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Montecillo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[Chapingo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2007</year>
</pub-date>
<volume>13</volume>
<numero>2</numero>
<fpage>85</fpage>
<lpage>90</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40182007000200085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40182007000200085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40182007000200085&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La aplicación de fertilizantes nitrogenados tiene el propósito de complementar el aporte de nitrógeno edáfico para satisfacer la demanda del cultivo; sin embargo, el uso inapropiado de estos insumos aumenta la cantidad de nitrato residual en el suelo (Nr) y el riesgo de su posterior lixiviación, independientemente si se trata de fertilizantes sintéticos (FS) u orgánicos. Con el objetivo de comparar el efecto de la fertilización sobre el Nr, se hizo un ensayo de respuesta a la aplicación de nitrógeno, considerando al brócoli como cultivo indicador por su alta demanda de este nutrimento. Se emplearon FS o abono verde, aplicado este último al momento del trasplante (AV1) o 15 días previos al mismo (AV2). La respuesta del brócoli fue cuadrática (300 kg N·ha-1 como dosis óptima fisiológica), con rendimiento máximo de 1.94, 1.55 y 1.31 kg·planta-1 para FS, AV1 y AV2, respectivamente. Los FS dejaron menos Nr, seguido por AV1 y AV2, por lo que se concluye que si no se aplican los fertilizantes orgánicos de manera oportuna se incrementará el Nr, con el consecuente riesgo de su lixiviación y contaminación de los mantos freáticos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY The application of nitrogen fertilizers has the purpose to complete soil nitrogen supply to satisfied the crop demands; however, the inappropriate use of these inputs increase the quantity of residual nitrate in soil (Nr) and the risk of its posterior leaching, not being an issue if the fertilizers are synthetic (FS) or organic. The goal is to compare the effect of fertilization over Nr an essay of response to application of nitrogen was made, considering broccoli as crop indicator for its high demand in this nutrient. The elements were FS or green manure, this last applied on transplantation time (AV1) or fifteen days before the same (AV2). The broccoli response was quadratic (300 kg N·ha-1 as optimums physiological rate) with maximum yield of 1.94, 1.55 and 1.31 kg·plant-1 for FS, AV1 and AV2, respectively. The FS release less Nr, followed by AV1 and AV2, so we conclude that if organic fertilizers are not applied on time the Nr will increase, with the subsequent risk of leaching and water table pollution.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[lixiviación]]></kwd>
<kwd lng="es"><![CDATA[mineralización]]></kwd>
<kwd lng="es"><![CDATA[brócoli]]></kwd>
<kwd lng="en"><![CDATA[leaching]]></kwd>
<kwd lng="en"><![CDATA[mineralization]]></kwd>
<kwd lng="en"><![CDATA[broccoli]]></kwd>
</kwd-group>
</article-meta>
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