<?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>S0187-57792014000400301</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto del agregado de diésel-oil sobre algunos parámetros microbiológicos del suelo con y sin presencia de plantas]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of diesel-oil addition on soil microbiological parameters in systems with and without plants]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Petenello]]></surname>
<given-names><![CDATA[María Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Beltrán]]></surname>
<given-names><![CDATA[Celina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Feldman]]></surname>
<given-names><![CDATA[Susana Raquel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Rosario Facultad de Ciencias Agrarias ]]></institution>
<addr-line><![CDATA[Santa Fe ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Rosario Facultad de Ciencias Agrarias ]]></institution>
<addr-line><![CDATA[Santa Fe ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Rosario Facultad de Ciencias Agrarias ]]></institution>
<addr-line><![CDATA[Santa Fe ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<volume>32</volume>
<numero>4</numero>
<fpage>301</fpage>
<lpage>309</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792014000400301&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792014000400301&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792014000400301&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La actividad industrial, el transporte de combustibles y las fugas de tanques y cañerías provocan frecuentemente derrames de hidrocarburos durante la manipulación y el uso de los mismos, que contaminan el suelo con el riesgo de alcanzar las capas freáticas. Dentro de los métodos de remediación de suelos contaminados, la fitorremediación es una de las técnicas de remoción de contaminantes para recuperar la salud del suelo que combina la acción de las plantas con los microorganismos asociados a ellas. En el presente trabajo se utilizó el proceso de remediación menos costoso, no se emplearon fertilizantes, ni se incorporaron bacterias seleccionadas por su capacidad remediadora, sino que se aprovechó la propia actividad de los microorganismos (atenuación natural). Ciertas propiedades biológicas del suelo pueden emplearse para monitorear la marcha de un proceso fitorremediador. En el experimento se emplearon dos concentraciones de diésel-oil en suelo (1 y 2%), con la presencia de plantas de Spartina argentinensis y Melilotus alba, se evaluaron la respiración, la biomasa microbiana y el cociente respiratorio en dos momentos. Hacia el final del experimento, la producción de CO2 se vio incrementada por la presencia de diésel-oil. La biomasa microbiana aumentó con la menor concentración de diésel-oil pero la mayor concentración provocó probablemente un efecto tóxico sobre los microorganismos, en consecuencia, el mayor estrés causado por la concentración de contaminante (2% de diésel-oil) quedó demostrado con el qCO2. La importancia de los parámetros evaluados radica en que permiten conocer la respuesta de las comunidades microbianas del suelo ante la presencia del diésel-oil.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Soils become frequently contaminated by industrial activity, fuel transport or leaking pipes and fuel storage tanks. Consequently, when these accidents occur there is a great risk that pollutants reach the water table. Among other techniques recommended to remediate contaminated soils, phytoremediation, a technique that includes the action of plants together with its associated microbes, is much recommended because of its low cost. In this particular experiment neither specially selected bacteria nor fertilizers were used, but only natural properties of plant-soil conditions. There are a series of biological properties of soils that can be employed to monitor a phytoremediation process. In this experiment soil respiration, soil microbial biomass and metabolic quotient were measured at two moments of the experiment (30 and 75 days). Seeds of Spartina argentinensis and Melilotus alba were sown in pots with soil previously contaminated with 1 and 2% diésel-oil, and the plants were maintained under greenhouse conditions. CO2 production increased in all diesel-oil treatments by the end of the experiment. Microbial biomass also increased only in the 1% diesel-oil treatment but not in the higher concentration, probably due to some toxic effect of 2% diesel-oil on microorganisms. Consequently, stress caused by the higher contaminant concentration resulted in a greater qCO2. The importance of the evaluated parameters is that they allow knowledge of how soil microbial communities respond to the presence of diesel-oil.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biomasa microbiana]]></kwd>
<kwd lng="es"><![CDATA[cociente metabólico]]></kwd>
<kwd lng="es"><![CDATA[fitorremedición]]></kwd>
<kwd lng="es"><![CDATA[respirometría]]></kwd>
<kwd lng="en"><![CDATA[metabolic quotient]]></kwd>
<kwd lng="en"><![CDATA[microbial biomass]]></kwd>
<kwd lng="en"><![CDATA[phytoremediation]]></kwd>
<kwd lng="en"><![CDATA[respirometry]]></kwd>
</kwd-group>
</article-meta>
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