<?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>S0187-57792012000200189</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto en las características edáficas de un bosque templado por el cambio de uso de suelo]]></article-title>
<article-title xml:lang="en"><![CDATA[Edaphic characteristics of a forest temperate by effect of the land use change]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Ruiz]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Ruiz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilera-Gómez]]></surname>
<given-names><![CDATA[L. I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Norman-Mondragón]]></surname>
<given-names><![CDATA[H. T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nava-Bernal]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dendooven]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Reyes]]></surname>
<given-names><![CDATA[B. G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de México Instituto de Ciencias Agropecuarias y Rurales ]]></institution>
<addr-line><![CDATA[Toluca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[Toluca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Ciencias Agrícolas ]]></institution>
<addr-line><![CDATA[Toluca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,IPN Centro de Investigación y de Estudios Avanzados Departamento de Biotecnología y Bioingeniería]]></institution>
<addr-line><![CDATA[Irapuato Gto.]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<volume>30</volume>
<numero>2</numero>
<fpage>189</fpage>
<lpage>197</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792012000200189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792012000200189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792012000200189&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En el bosque del parque Nacional Nevado de Toluca, localizado entre los 3000 y 4800 m de altitud, se ha perdido importante masa forestal, atribuible al cambio de uso de suelo forestal a agrícola. Este cambio conlleva prácticas de manejo, como el barbecho y la incorporación de fertilizantes lo que puede favorecer la liberación de gases de efecto invernadero. En este trabajo se investigó la influencia del uso de suelo sobre la respiración y las propiedades físicas y químicas del suelo y la afectación de la aplicación de biocidas y de fertilizantes nitrogenados sobre la mineralización del carbono (C) y nitrógeno (N). En dos comunidades, se tomaron muestras de suelos bajo tres usos: suelo de bosque (SB), bajo la copa de oyamel (Abies religiosa); suelo bajo cultivo continuo (SC) y suelo abandonado durante cinco años, al menos, destinado al pastoreo (SP). Se determinaron las propiedades físicas y químicas de los suelos, los tratamientos aplicados a los suelos fueron: sulfato de amonio (585.36 kg ha-1) (tratamiento amonio), urea (250 kg ha-1) (tratamiento urea), 2,4-D (1 L ha-1) (tratamiento 2,4-D), captan (2 kg ha-1) (tratamiento captan) y sin modificación (tratamiento testigo). Los suelos con los tratamientos se mantuvieron en incubación aeróbica durante 56 días, a 22± 2°C. Al concluir la incubación se cuantificó el CO2 liberado y el nitrógeno mineral (NH4+ + NO3-). El contenido de materia orgánica, nitrógeno total, densidad aparente, capacidad de retención de agua (CRA), capacidad de intercambio de cationico y emisión de CO2 fueron modificadas significativamente en los SC; en ellos el C orgánico disminuyó en más del 55%, con respecto a los SB. Textura y conductividad eléctrica no mostraron modificación significativa. La mineralización de C se incrementó en los SB y en los SP, con la adición de fertilizantes y biocidas. La mineralización de N aumentó en forma inversamente proporcional a la degradación de los suelos, con la adición de fertilizantes, independientemente del uso de suelo. El uso de los suelos para la agricultura del Parque Nacional Nevado de Toluca degrada sus propiedades físicas y químicas y tiene un efecto significativo sobre los ciclos del C y del N.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In the National Park Nevado de Toluca (NPNT), located at an altitude of 3000 to 4800 m, forest mass has been lost as a consequence of land-use change (LUC) from forest to agriculture. Tillage and industrial fertilizers can favor emission of greenhouse gases. We studied how LUC impacts soil respiration and physicochemical properties, and how nitrogen fertilizer application affects the mineralization of carbon (C) and nitrogen (N). Soil samples were taken in two communities from the soil under Abies religiosa (SB), from crop soil (SC) and from soils abandoned for at least three years and used for sheep grazing (SP). Soil samples were characterized physicochemically and treated with applications of ammonium sulfate (585.36 kg ha-1) (ammonium treatment) or urea (250 kg ha-1) (urea treatment), or 2,4-D (1 L ha-1) (treatment 2,4-D), or captan (2 kg ha-1) (captan treatment) or nothing (dummy treatment). On the 56th day of an aerobic incubation CO2 emission and mineral nitrogen (NH4+ + NO3-) were quantified. Organic matter, total N, apparent density, water holding capacity, CIC and CO2 emission were found significantly modified at SC; organic carbon content was 55% less than SB. Texture and electrical conductivity were not modified by LUC. C mineralization increased in SB and SP when fertilizers and biocides were applied. The increase in N mineralization was inversely proportional to degradation when fertilizers were applied, regardless of land use. Agricultural land use in the Nevado de Toluca National Park NPNT degrades soil physicochemical properties and significantly modifies C and N cycles.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[CO2]]></kwd>
<kwd lng="es"><![CDATA[fertilizantes]]></kwd>
<kwd lng="es"><![CDATA[biocidas]]></kwd>
<kwd lng="es"><![CDATA[mineralización de C y de N]]></kwd>
<kwd lng="en"><![CDATA[CO2]]></kwd>
<kwd lng="en"><![CDATA[fertilizers]]></kwd>
<kwd lng="en"><![CDATA[C and N mineralization]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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