<?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>S2007-09342015000801903</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Mejoramiento del grado de uso del nitrógeno en maíz mediante técnicas parcelarias de riego por superficie]]></article-title>
<article-title xml:lang="en"><![CDATA[Improving the usage level of nitrogen in maize, through surface irrigation plot techniques]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sifuentes Ibarra]]></surname>
<given-names><![CDATA[Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Macías Cervantes]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruelas Islas]]></surname>
<given-names><![CDATA[Jesús del Rosario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Preciado Rangel]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ojeda Bustamante]]></surname>
<given-names><![CDATA[Waldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Inzunza Ibarra]]></surname>
<given-names><![CDATA[Marco Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Samaniego Gaxiola]]></surname>
<given-names><![CDATA[José Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP Campo Experimental Valle del Fuerte ]]></institution>
<addr-line><![CDATA[Juan José Ríos Sinaloa]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,UAS Escuela Superior de Agricultura del Valle del Fuerte ]]></institution>
<addr-line><![CDATA[Juan José Ríos Sinaloa]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico de Torreón  ]]></institution>
<addr-line><![CDATA[ Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Mexicano de Tecnología del Agua  ]]></institution>
<addr-line><![CDATA[Jiutepec Morelos]]></addr-line>
</aff>
<aff id="Af5">
<institution><![CDATA[,INIFAP Centro Nacional de Investigación Disciplinaria en Relación Agua-Suelo-Planta-Atmosfera ]]></institution>
<addr-line><![CDATA[Gómez Palacio Durango]]></addr-line>
</aff>
<aff id="Af6">
<institution><![CDATA[,INIFAP Campo Experimental La Laguna ]]></institution>
<addr-line><![CDATA[Matamoros Coahuila]]></addr-line>
</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>1903</fpage>
<lpage>1914</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342015000801903&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342015000801903&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342015000801903&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El maíz es uno de los principales cultivos sembrados en el estado de Sinaloa; sin embargo, en esta región la aplicación de riegos se realiza sin considerar las características físicas del suelo incrementando las pérdidas de agua y fertilizantes. Es importante desarrollar tecnologías que permitan optimizar el uso de insumos (agua, fertilizantes, pesticidas) incrementando el potencial productivo de los cultivos y reduciendo los costos de producción, por tal motivo una serie de experimentos se condujeron durante los ciclos otoño-invierno 2006-2007 y 2011-2012 en el INIFAP-CEVAF ubicado en el norte de Sinaloa, México, con el propósito de conocer el efecto del riego por gravedad por diferentes técnicas en la eficiencia de uso del nitrógeno (N) en el cultivo de maíz. Dichos experimentos consistieron en bloques completos al azar con la aplicación de dos sistemas de riego de baja presión (multicompuertas), uno de tubería PVC y el otro de manguera Lay flat en el primer ciclo y tres técnicas de riego por superficie (surcos alternos, camas y reducción de gasto) en el segundo ciclo. Se comprobó que usando el sistema de riego de tuberías multicompuertas y las técnicas de riego implementadas en este estudio fue posible incrementar la eficiencia del riego en promedio 80% con un incremento gradual en la eficiencia del nitrógeno reduciendo las pérdidas de fertilizante y ahorrando volúmenes de agua que puedan utilizarse en escenarios de baja disponibilidad de agua y/o establecimiento de segundos cultivos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Maize is one of the main crops grown in the State of Sinaloa; however, in this region the application of irrigation is performed without considering the physical characteristics of the soil increasing losses of water and fertilizer. It is important to develop technologies to optimize the use of inputs (water, fertilizers, pesticides) increasing the productive potential of crops and reducing production costs, for this reason a series of experiments were conducted during the 2006-2007 autumn-winter cycles and 2011-2012 in the INIFAP-CEVAF located in the north of Sinaloa, Mexico, in order to know the effect of gravity irrigation by different techniques in use efficiency of nitrogen (N) in the maize crop. These experiments consisted of a randomized complete block to the implementation of two low pressure irrigation systems (multi-gates), one of PVC pipe and the other of Lay flat hose, in the first cycle and three surface irrigation techniques (alternate rows, beds and reducing spending) in the second cycle. It was found that using the pipe multi-gates irrigation system and the implemented irrigation techniques in this study was possible to increase irrigation efficiency on averaged 80% with a gradual increase in the efficiency of nitrogen fertilizer reducing losses and saving water volumes that can be used in scenarios of low water availability and establishment of second crops.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[eficiencia de uso de nitrógeno]]></kwd>
<kwd lng="es"><![CDATA[sistemas de riego de baja presión]]></kwd>
<kwd lng="es"><![CDATA[técnicas de riego por superficie]]></kwd>
<kwd lng="en"><![CDATA[low pressure irrigation systems]]></kwd>
<kwd lng="en"><![CDATA[nitrogen use efficiency]]></kwd>
<kwd lng="en"><![CDATA[surface irrigation techniques]]></kwd>
</kwd-group>
</article-meta>
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