<?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>S0188-49992020000100115</article-id>
<article-id pub-id-type="doi">10.20937/rica.2020.36.53264</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[TOTAL CONTENT AND AVAILABILITY OF MICRONUTRIENTS IN SOILS AND LIVESTOCK MANURE]]></article-title>
<article-title xml:lang="es"><![CDATA[CONTENIDO TOTAL Y DISPONIBILIDAD DE MICRONUTRIENTES EN SUELOS Y EXCRETAS BOVINAS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[María Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moscuzza]]></surname>
<given-names><![CDATA[Carlos Hernán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández Cirelli]]></surname>
<given-names><![CDATA[Alicia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Buenos Aires Facultad de Ciencias Veterinarias Instituto de Investigaciones en Producción Animal]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>36</volume>
<numero>1</numero>
<fpage>115</fpage>
<lpage>126</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992020000100115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992020000100115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992020000100115&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The use of feedlot cattle manure appears as an important source of certain trace metals in soils that can be mobilized by water modifying the surface and groundwater quality. The current study is focused on assessing the availability of copper (Cu), zinc (Zn), cobalt (Co) and molybdenum (Mo) in manure from confined beef cattle systems and different soils of the Chaco-pampean plain, using a sequential extraction scheme. Soils and bovine manure coming from intensive (IS) and extensive (ES) beef cattle systems were collected. Total contents of Cu, Zn, Co and Mo were determined after microwave assisted acid digestion. Availability was evaluated through sequential extraction, including water-soluble and exchangeable fraction (EXCH), organic matter bound fraction (OM), inorganic precipitated fraction (INOR), and residual fraction (RES). Total Cu and Zn contents found in manure coming from IS were higher than the concentration of the aforementioned trace elements determined in all soils and manure analyzed from ES. EXCH-Cu only appears in IS cattle manure samples, while EXCH-Zn found in IS manure samples were higher than the soils samples analyzed. The higher levels of total and availability forms of Cu and Zn determined in IS manure compared to soils samples, require considering when this organic amendment is applied as fertilizer. These results indicate that the reuse of intensive cattle manure as fertilizer in agricultural areas could provide available forms of metals in soils and could contribute to reduce the environmental impact caused by the accumulation of excreta in pen soils during long periods in farms.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El uso de excretas provenientes de sistemas intensivos de engorde bovino aparece como una fuente importante de ciertos metales traza en suelos, los cuales pueden ser movilizados por escorrentía y lixiviado, modificando la calidad de cursos de agua superficial y subterránea. Este trabajo propone evaluar la disponibilidad de cobre (Cu), zinc (Zn), cobalto (Co) y molibdeno (Mo) en excretas provenientes de sistemas intensivos de engorde bovino y en diferentes suelos de la llanura Chaco-pampeana, utilizando un procedimiento de extracción secuencial. Se recolectaron muestras de suelos y excretas provenientes de sistemas intensivos (SI) y extensivos (SE) de producción de ganado vacuno. Los contenidos totales de Cu, Zn, Co y Mo se determinaron mediante digestión ácida asistida por microondas. La disponibilidad fue evaluada mediante un esquema de extracción secuencial que incluyó una fracción soluble en agua e intercambiable (INT), una fracción unida a materia orgánica (MO), una fracción inorgánica (INOR) y una fracción residual (RES). Los resultados obtenidos mostraron mayores contenidos totales y de la fracción intercambiable de Cu y Zn en excretas provenientes de SI respecto de las muestras de suelos y excretas provenientes de SE. Estos resultados indicarían que el uso de las excretas de sistemas intensivos de engorde bovino incrementaría las formas más disponibles de metales en suelos, de modo tal que su empleo como enmiendas orgánicas puede contribuir a reducir el impacto ambiental que origina su acumulación en suelos de corrales.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[trace metals]]></kwd>
<kwd lng="en"><![CDATA[cattle manure]]></kwd>
<kwd lng="en"><![CDATA[sequential extraction]]></kwd>
<kwd lng="en"><![CDATA[organic fertilization]]></kwd>
<kwd lng="es"><![CDATA[elementos traza]]></kwd>
<kwd lng="es"><![CDATA[estiércol bovino]]></kwd>
<kwd lng="es"><![CDATA[extracción secuencial]]></kwd>
<kwd lng="es"><![CDATA[fertilización orgánica]]></kwd>
</kwd-group>
</article-meta>
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