<?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>2301-1548</journal-id>
<journal-title><![CDATA[Agrociencia (Uruguay)]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia Uruguay]]></abbrev-journal-title>
<issn>2301-1548</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Agronomía - Instituto Nacional de Investigación Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2301-15482017000100120</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estimación de la productividad primaria neta aérea y capacidad de carga ganadera: un estudio de caso en Sierras del Este, Uruguay]]></article-title>
<article-title xml:lang="en"><![CDATA[Estimating Aboveground Net Primary Production and Carrying Capacity: a Case Study in Sierras del Este, Uruguay]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallego]]></surname>
<given-names><![CDATA[Federico]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lezama]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pezzani]]></surname>
<given-names><![CDATA[Fabiana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Mársico]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leoni]]></surname>
<given-names><![CDATA[Elsa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mello]]></surname>
<given-names><![CDATA[Ana Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[Beatríz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de la República Facultad de Ciencias Instituto de Ecología y Ciencias Ambientales]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de la República Facultad de Agronomía Departamento de Sistemas Ambientales, Ecología]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Uruguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<volume>21</volume>
<numero>1</numero>
<fpage>120</fpage>
<lpage>130</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S2301-15482017000100120&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S2301-15482017000100120&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S2301-15482017000100120&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En los sistemas de producción ganadera bajo pastoreo es fundamental conocer la Capacidad de Carga (CC). La Productividad Primaria Neta Aérea (PPNA) es la variable más importante para estimar la CC ya que representa la principal fuente de energía para los herbívoros. La PPNA puede ser estimada a partir de cortes sucesivos de biomasa o a partir de información espectral. En este trabajo nos planteamos generar información de la PPNA, de dos unidades de pastizales (densos y abiertos), a partir de datos satelitales. Para ello se determinó la Eficiencia en el Uso de la Radiación (EUR) de las unidades de pastizal mediante la combinación de datos satelitales y datos de campo. A su vez estimamos, a partir de un método simplificado, la CC de un establecimiento ganadero representativo de la región de Sierras del Este. La EUR para pastizales densos fue de 0,38 grMS/MJ (Materia Seca/Mega Joules), mientras que para pastizales abiertos fue de 0,44 grMS/MJ. La EUR de los pastizales no mostró ser significativamente diferente, por lo que la EUR total fue de 0,36 grMS/MJ. La PPNA promedio para los 14 años de los pastizales densos y abiertos fue de 2876 y 1711 kgMS/ha*año, respectivamente. La CC promedio para el establecimiento analizado fue de 0,44 UG/ha. La CC varió entre los potreros dependiendo de la importancia relativa de cada unidad de pastizal. La información de PPNA generada y el procedimiento de estimación de CC empleado ponen a disposición de técnicos y productores, una forma sencilla para estimar la CC de sus potreros.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: In livestock production systems under grazing it is essential to know the Carrying Capacity (CC). Aboveground Net Primary Productivity (ANPP) is the most important variable to estimate the CC as it represents the main source of energy for herbivores. The ANPP can be estimated from successive biomass harvests or from spectral information. The aim of this study was generate information about the ANPP, for two grassland units (dense and open), based on satellite data. For this purpose, the Efficiency in the Use of the Radiation (EUR) was determined for two grasslands units, by combining satellite and field data. In turn, we estimated, based on a simplified method, the CC of a representative cattle farm in Sierras del Este region. EUR was 0,38 and 0,44 grMS/MJ (Dry Matter/Mega Joules) for dense and open grasslands, respectively. The EUR for each grassland unit did not show significant differences. For this reason the total EUR was of 0,36 grMS/MJ. The average ANPP for the 14 years of the dense and open grasslands was 2876 and 1711 kgMS/ha*year, respectively. The average CC for the analyzed farm was 0,44 UG/ha. CC varied among paddocks depending on the relative importance of each grassland unit. The ANPP information generated and the CC estimation procedure used in this study provides to technicians and producers a simple way to estimate the CC of their farm.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[teledetección]]></kwd>
<kwd lng="es"><![CDATA[eficiencia en el uso de la radiación]]></kwd>
<kwd lng="es"><![CDATA[pastizales]]></kwd>
<kwd lng="en"><![CDATA[remote sensing]]></kwd>
<kwd lng="en"><![CDATA[radiation use efficiency]]></kwd>
<kwd lng="en"><![CDATA[grasslands]]></kwd>
</kwd-group>
</article-meta>
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