<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792011000300239</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Pérdidas de nitratos y salinización del suelo por riego por goteo con nitrógeno]]></article-title>
<article-title xml:lang="en"><![CDATA[Loss of Nitrates and Salt Accumulation in Soil by Drip Irrigation with Nitrogen]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zamudio-González]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza-Nicolás]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alcántar-González]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Etchevers-Barra]]></surname>
<given-names><![CDATA[J. D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez-Alarcón]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Suelos ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2011</year>
</pub-date>
<volume>29</volume>
<numero>3</numero>
<fpage>239</fpage>
<lpage>248</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792011000300239&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792011000300239&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792011000300239&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Existen modelos de predicción del movimiento de los nitratos en frentes de humedecimiento de suelos homogéneos o flujo preferencial en suelos estructurados; sin embargo, se desconoce la dinámica del lixiviado de los NO3 - aplicados en riego por goteo asociados al lavado de K+, Na+ y cambios del pH, la conductividad eléctrica (CE) y la relación de adsorción de sodio (RAS) para distintas fuentes nitrogenadas. En laboratorio fueron instaladas columnas con suelo y subsuelo procedentes del estado de Sonora, México. Se evaluó la infiltración y drenaje para lavar sales mediante riego por inundación con agua alcalina (A), agua con yeso agrícola y ácido sulfúrico (aguayeso, Am). Se cuantificaron los nitratos y cambios de CE, pH, K+, Na+ y RAS de 12 lixiviados de fertirriegos simulados por goteo con 310 mg L-1 de NO3 -, en láminas de 4 mm. Se utilizaron siete fuentes comerciales de N. Las conclusiones fueron: a) en el suelo se infiltró más rápido con Am contra A; pero con respecto el lavado de sales, NO3 -, K+ y Na+ fueron iguales; b) el subsuelo lixivió 10 veces más NO3 - contra el suelo; c) los fertilizantes con base en NO3 - presentaron curvas con un sólo pico de lixiviación de nitratos asociado al frente de humedecimiento desde el tercer fertirriego y curvas con dos a tres picos moderados de concentración de nitratos con fuentes amoniacales; d) con Am los valores de pH fueron menos alcalinos con Mg(NO3)2 en el suelo y con KNO3 y CO(NH2)2 en el subsuelo; e) fue mayor la CE en subsuelo con (NH ) SO y Am; f) el K+ es más lixiviable en suelo al añadirle al aguayeso con fertirriego de Mg(NO3)2 y (NH4)2SO4; g) la resalinización (CE) y sodificación (RAS) aumentó con NaNO3 con agua alcalina (A); h) se asociaron altas concentraciones de nitratos en los frentes de humedecimiento en subsuelo, no así en suelo por riego por goteo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract There are prediction models about the nitrates movement in the humidity fronts of homogenous soils or preferred flow in structured soils, but it is unknown the dynamics of leaching of the NO3 - applied in drip irrigation associated with the washing of K+, Na+ and changes of pH, electrical conductivity (EC) and sodium adsorption relationship (SAR) for different nitrogen sources. Soil columns were established with soil and subsoil from Sonora, Mexico. The infiltration and drainage required to wash out the salts with irrigation by flooding with alkaline water (A) and water with agronomic gypsum and sulfuric acid (Am) was evaluated. The nitrates and changes of EC, pH, K+, Na+ and SAR from 12 leachates were measured equally to simulate fertirigation by drip with 310 mg L-1 of NO3 - in 4 mm water layers. Seven commercial sources of N were used. The conclusions were: a) the infiltration in soil was higher with Am than with A, but the wash out of salts, NO3 -, K+ and Na+ were similar, b) subsoil leached 10 times more NO3 - than soil, c) fertilizers with NO3 - showed only one peak of nitrates leached associated with humidity front since third fertigation, and the fertilizers with ammoniac sources showed two and three peaks of nitrates since the third fertirrigation, d) with Am pH values were less alkaline with Mg(NO3)2 in soil and with KNO3 and CO(NH2)2 in subsoil, e) the EC in subsoil was higher with (NH4)2 SO4 and Am, f) the K+ is more leachable in soil when adding gypsum water, Mg(NO3)2 and (NH4)2SO4, g) the salts (EC) and sodium (SAR) were increased with NaNO3 with alkaline water (A), h) there were associations with high nitrate concentrations in humidity fronts in the subsoil but not in soil by drip irrigation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[fertilizantes nitrogenados]]></kwd>
<kwd lng="es"><![CDATA[mejoradores del suelo]]></kwd>
<kwd lng="es"><![CDATA[movimiento de agua]]></kwd>
<kwd lng="es"><![CDATA[drenaje]]></kwd>
<kwd lng="en"><![CDATA[nitrogen fertilizers]]></kwd>
<kwd lng="en"><![CDATA[soil amendments]]></kwd>
<kwd lng="en"><![CDATA[water movement]]></kwd>
<kwd lng="en"><![CDATA[drainage]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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