<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992006000300125</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[MINERALIZACIÓN DEL NITRÓGENO CONTENIDO EN UN LODO DE DEPURADORA SECADO TÉRMICAMENTE]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martín]]></surname>
<given-names><![CDATA[José Valero]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Miralles de Imperial]]></surname>
<given-names><![CDATA[Rosario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Beltrán]]></surname>
<given-names><![CDATA[Eulalia Ma.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Porcel]]></surname>
<given-names><![CDATA[Miguel Angel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Beringola]]></surname>
<given-names><![CDATA[Ma. Luisa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calvo]]></surname>
<given-names><![CDATA[Rosa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado]]></surname>
<given-names><![CDATA[Ma. del Mar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIA Departamento de Medio Ambiente ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,INIA Servicio de Biometría ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2006</year>
</pub-date>
<volume>22</volume>
<numero>3</numero>
<fpage>125</fpage>
<lpage>133</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992006000300125&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992006000300125&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992006000300125&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se presentan resultados de un ensayo de mineralización con lodo de depuradoras de aguas residuales secado térmicamente con el fin de comprobar su comportamiento al aplicarlo al suelo. Se realizó un ensayo de incubación de 52 semanas con tres tipos de suelos (S1, S2, S3) que fueron mezclados con diferentes dosis de lodo secado térmicamente: 0, 15, 30 y 60 t ha-1. Los resultados mostraron que la mayor cantidad de nitrógeno mineralizado aportada por el lodo secado térmicamente se produjo en el suelo S1 (ácido) con 364.60 mg N por kg de suelo seguido del suelo S2 (básico) con 292.19 mg N por kg de suelo y por último la arena, S3 con 221.85 mg N por kg de suelo. Se ajustaron los modelos de regresión para describir la mineralización del lodo secado térmicamente, y para comprobar las variaciones existentes entre los diferentes suelos y las diversas dosis de aplicación. Los modelos se ajustaron tanto a los datos de la suma de N-amonio (N-NH4 +) y N-nitrato (N-NO3 -) como para cada una de estas variables por separado. En el caso del N-NO3 - se encontraron diferencias en el inicio de la nitrificación entre los diferentes suelos. Es importante considerar lo anterior para sincronizar la aplicación con la demanda del cultivo y evitar con ello la contaminación ambiental.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Results of a trial of nitrogen mineralization are presented in order to evaluate the mineralization of thermally dried sewage sludge applied to soil. A laboratory incubation was conducted during 52 weeks with three different soils (S1, S2, S3) and thermally dried sewage sludge applied in rates of 0, 15, 30 and 60 t ha-1. The results showed that the cumulative nitrogen mineralized (N-NH4 + + N-NO3 - ) for S1 (acid) was 364.60 mg N kg-1 soil , 292.19 mg N kg-1 soil for S2 (basic) and 221.85 mg N kg-1 soil for S3 (sand). The response of each variable (N-NH4 + + N-NO3 - , N-NH4 + , N-NO3 -) and each soil (S1, S2, S3) ammended with different application rates was evaluated by regression analyses and the results showed differences between all soils and rates. For N-NO3 - the results showed differences between soils at the beginning of nitrification. These results are important because they allow to synchronize the application of sludge ammendments to the soils with the N-demand of the crops and thereby optimize productivity avoiding environmental pollution.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[modelos]]></kwd>
<kwd lng="es"><![CDATA[mineralización]]></kwd>
<kwd lng="es"><![CDATA[nitrógeno]]></kwd>
<kwd lng="es"><![CDATA[lodo]]></kwd>
<kwd lng="es"><![CDATA[secado térmico]]></kwd>
<kwd lng="es"><![CDATA[incubación aeróbica]]></kwd>
<kwd lng="es"><![CDATA[N-amonio]]></kwd>
<kwd lng="es"><![CDATA[N-nitrato]]></kwd>
<kwd lng="en"><![CDATA[models]]></kwd>
<kwd lng="en"><![CDATA[mineralization]]></kwd>
<kwd lng="en"><![CDATA[nitrogen]]></kwd>
<kwd lng="en"><![CDATA[sludge]]></kwd>
<kwd lng="en"><![CDATA[thermal dry]]></kwd>
<kwd lng="en"><![CDATA[aerobic incubation]]></kwd>
<kwd lng="en"><![CDATA[N-ammonia]]></kwd>
<kwd lng="en"><![CDATA[N-nitrate]]></kwd>
</kwd-group>
</article-meta>
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