<?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>S0187-57792013000400221</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variación de las poblaciones microbianas del suelo por la adición de hidrocarburos]]></article-title>
<article-title xml:lang="en"><![CDATA[Variation of soil microbial populations affected by the addition of hydrocarbons]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro-Mancilla]]></surname>
<given-names><![CDATA[Yudith Viridiana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro-Meza]]></surname>
<given-names><![CDATA[Blanca I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de la Garza-Requena]]></surname>
<given-names><![CDATA[Francisco R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivera-Ortiz]]></surname>
<given-names><![CDATA[Patricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Heyer-Rodríguez]]></surname>
<given-names><![CDATA[Lorenzo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz-Carrizales]]></surname>
<given-names><![CDATA[Yessica P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas Facultad de Ingenieria y Ciencias División de Estudios de Postgrado e Investigación]]></institution>
<addr-line><![CDATA[Cd. Victoria Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2013</year>
</pub-date>
<volume>31</volume>
<numero>3</numero>
<fpage>221</fpage>
<lpage>230</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792013000400221&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792013000400221&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792013000400221&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Las poblaciones microbianas son alteradas por la presencia de hidrocarburos, particularmente las que tienen la capacidad de utilizarlos como fuente de carbono. El objetivo del presente trabajo fue evaluar el efecto de los hidrocarburos sobre las poblaciones microbianas del suelo. Se realizó el experimento en condiciones de invernadero con cinco tratamientos: T1 = testigo; T2 = suelo + aceite; T3 = suelo + aceite + nitrógeno y fósforo (NP); T4 = suelo + diesel y T5 = suelo + diesel + nitrógeno y fósforo (NP). Se utilizó suelo agrícola contaminado ex profeso, con 10% en peso con aceite de lubricación automotriz en el tratamiento T2 y T3 y diesel en el tratamiento T4 y T5. La variación en las poblaciones microbianas del suelo fue determinada mediante la técnica del número más probable (NMP). Se midió la respiración edáfica del suelo en estudio y el contenido de hidrocarburos totales de petróleo. Los resultados indicaron que los microorganismos del suelo y degradadores de hidrocarburos fueron estimulados por la presencia de aceite y diesel. La población fluctuó de 1 × 105 UFC g-1 del suelo testigo hasta 1 × 108 UFC g-1 en el suelo con diesel más nitrógeno y fósforo, que fue el valor más alto. La adición de ambos hidrocarburos aumentó la actividad biológica del suelo evaluada como el índice de respiración edáfica y medida como producción de CO2, la cual osciló de 1% del suelo testigo hasta 9% en el tratamiento con diesel y nutrimentos. Se concluye que el diesel y aceite de lubricación automotriz influyeron en la dinámica de las poblaciones microbianas del suelo, ya que la comunidad microbiana los utiliza como fuente de carbono, indicado por la producción de CO2, subproducto de la degradación de los hidrocarburos. El balance del contenido de carbono, nitrógeno y fósforo (C:N:P), en los suelos, favorece el aprovechamiento de los hidrocarburos por las poblaciones microbianas del suelo; las poblaciones microbianas están limitadas al sustrato, es decir, a la cantidad disponible de hidrocarburos en el suelo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Microbial populations are altered by the presence of hydrocarbons, particularly those who are capable of using as a carbon source. This work aimed to evaluate the effect of hydrocarbons on soil microbial populations. The experiment was conducted under greenhouse conditions with five treatments: T1 = control; T2 = soil + oil; T3 = soil + oil + nitrogen and phosphorus (NP); T4 = soil + diesel and T5 = soil + diesel + nitrogen and phosphorus (NP). Agricultural soil was used expressly contaminated with 10% by weight in automotive lubricating oil for T2 and T3 or with diesel for T4 and T5. The variation in soil microbial populations was determined by the technique of most probable number (MPN). We measured soil respiration and the total content of petroleum hydrocarbons. The results indicated that soil microorganisms and hydrocarbon degraders were stimulated by the presence of oil and diesel. The population ranged from 1 × 105 CFU g-1 control soil to 1 × 108 CFU g-1 in the soil with diesel + nitrogen and phosphorus, the latter was the highest value. The addition of both hydrocarbons increased soil biological activity evaluated as the index and soil respiration measured as CO2 production, which ranged from 1% in the control soil to 9% in the soil + diesel and nutrients (NP). It is concluded that diesel and automotive lubrication oil influenced the dynamics of soil microbial populations and microbial community that uses them as a carbon source, as indicated by CO2 production, by product of hydrocarbon degradation. The balance of carbon, nitrogen and phosphorus (C:N:P) in soils, favors the use of hydrocarbons by soil microbial populations; microbial populations are limited to the substrate, that is to say, the amount of available hydrocarbons in the soil.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biorremediación]]></kwd>
<kwd lng="es"><![CDATA[microbiota]]></kwd>
<kwd lng="en"><![CDATA[bioremediation]]></kwd>
<kwd lng="en"><![CDATA[microorganisms]]></kwd>
</kwd-group>
</article-meta>
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