<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952007000200205</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Degradación de plaguicidas en dispositivos amortiguadores: barreras de hierba y zonas arboladas: caso del isoproturon]]></article-title>
<article-title xml:lang="en"><![CDATA[Pesticide degradation in vegetative buffer strips: grassed and tree barriers: case of isoproturon]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Madrigal]]></surname>
<given-names><![CDATA[Ismael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benoit]]></surname>
<given-names><![CDATA[Pierre]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barriuso]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Réal]]></surname>
<given-names><![CDATA[Benoît]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dutertre]]></surname>
<given-names><![CDATA[Alain]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moquet]]></surname>
<given-names><![CDATA[Michel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trejo]]></surname>
<given-names><![CDATA[María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INRA Unité Environnement et Grandes Cultures ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>France</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,ARVALIS Service Techniques de Production ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>France</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2007</year>
</pub-date>
<volume>41</volume>
<numero>2</numero>
<fpage>205</fpage>
<lpage>217</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952007000200205&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952007000200205&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952007000200205&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La instalación de zonas amortiguadoras es una de las soluciones propuestas para combatir la contaminación de aguas superficiales por plaguicidas. Estas zonas son eficaces para detener los plaguicidas transportados en las escorrentías pero no hay mucha información sobre el devenir de las moléculas interceptadas. En este trabajo se evaluó la degradación de un herbicida, el isoproturon (IPU) [3-(4-isopropilfenil)-1, 1-dimetilurea], en suelos provenientes de barreras de hierba, zonas arboladas y parcelas de cultivo del sitio experimental de ARVALIS en la Jaillière, Francia. Los experimentos de degradación se realizaron en laboratorio utilizando el isoproturon marcado con 14C en el anillo bencénico. La mineralización del IPU fue especialmente importante en los horizontes superficiales de los suelos de las barreras de hierba y la zona arbolada. La formación de residuos no extraíbles es decir, poco disponibles, fue particularmente importante en los horizontes donde la degradación es más activa. Así, la estabilización de los residuos de isoproturon es máxima en los horizontes superficiales de los dispositivos amortiguadores. La disipación rápida del IPU en los suelos de las zonas amortiguadoras indica una función de descontaminación interesante en comparación con un suelo agrícola, ya que la degradación y la mineralización del IPU aumentan. Sin embargo, el débil potencial de degradación de los horizontes 30-60 cm indica que la eficacia de estos sistemas vía procesos de degradación y estabilización de los productos interesados, es mucho mas importante en los horizontes superficiales de suelo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The installation of vegetative buffer strips is one of the solutions proposed to combat pesticide pollution of surface water. These zones are effective in removing pesticides transported by runoff, but there is little information on what happens to the intercepted molecules. In this study, degradation of the herbicide isoproturon (IPU) [3-(4-isopropylphenyl)-1, 1-dimethylurea] in soils from grassed strip, treed zones, and farm plots at the ARVALIS experimental site in La Jaillière, France was assessed. The degradation experiments were conducted in laboratory using isoproturon marked with 14C in the benzene ring. Mineralization of IPU was especially important in the surface horizons of the soils from grassed strip and the treed zone. The formation of non-extractable, or low available residues was particularly important in the horizons where degradation is more active. Thus, the stabilization of isoproturon residues is highest in the topsoil horizons of the buffer strips. The rapid dissipation of IPU in the soils of the buffer zones indicates an interesting de-polluting function compared with agricultural soil since degradation and mineralization of IPU increase in the buffer zone soils. However, the weak degrading potential of the 30-60 cm horizons indicates that the effectiveness of these systems via degradation and stabilization processes of the products of interest is much more important in the topsoil horizons.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Agua]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[materia orgánica]]></kwd>
<kwd lng="es"><![CDATA[productos fitosanitarios]]></kwd>
<kwd lng="es"><![CDATA[zonas amortiguadoras]]></kwd>
<kwd lng="en"><![CDATA[Water]]></kwd>
<kwd lng="en"><![CDATA[pollution]]></kwd>
<kwd lng="en"><![CDATA[organic matter]]></kwd>
<kwd lng="en"><![CDATA[phytosanitary products]]></kwd>
<kwd lng="en"><![CDATA[vegetation buffer strips]]></kwd>
</kwd-group>
</article-meta>
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