<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952018000300455</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Concentración de carbono en tres especies de árboles tropicales de la sierra sur de Oaxaca, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Carbon concentration in three species of tropical trees in the sierra sur of Oaxaca, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aquino-Ramírez]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez-Martínez]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Etchevers-Barra]]></surname>
<given-names><![CDATA[Jorge D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castellanos-Bolaños]]></surname>
<given-names><![CDATA[Juan F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo Postgrado en Ciencias Forestales]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,INIFAP Campo Experimental Valles Centrales de Oaxaca ]]></institution>
<addr-line><![CDATA[Villa de Etla Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo Postgrado Edafología]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2018</year>
</pub-date>
<volume>52</volume>
<numero>3</numero>
<fpage>455</fpage>
<lpage>465</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952018000300455&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952018000300455&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952018000300455&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Todos los ecosistemas terrestres, pero en especial los bosques tropicales, son importantes para mitigar el cambio climático global ya que absorben y almacenan CO2 en forma de biomasa en los árboles. La identificación de la concentración de carbono (CC) en las especies arbóreas contribuye a mejorar las estimaciones de carbono (C) cuando se trata de hacer estimaciones en áreas relativamente grandes. El objetivo de este estudio fue determinar y comparar la CC en tres especies tropicales de árboles: Alchornea latifolia Sw, Cupania dentata DC. e Inga punctata Willd. de la Sierra Sur de Oaxaca, México. Por lo tanto, se midió la CC en fuste, ramas y hojas en árboles de diámetros diferentes. Para cada especie se seleccionaron tres individuos en tres categorías diamétricas CD I (menor a 10 cm), CD II (entre 10 y 20 cm) y CD III (entre 21 y 35 cm) de las que se obtuvieron muestras para los componentes estructurales. La CC expresado en porcentaje de la biomasa se determinó en un analizador automático de carbono total Shimadzu TOC 5000-A. Los datos se analizaron en un ANDEVA para un diseño completamente al azar y las medias se compararon con la prueba de Tukey (p&#8804;0.05). La CC en los componentes estructurales y categorías diamétricas en las tres especies fueron inferiores al valor que de manera genérica se maneja como aceptado del 50 %. La menor CC se presentó en el fuste de la CD I de I. punctata con 44.82 %, y la más alta fue en las hojas de la CD III de C. dentata con 47.72 %. La media general de CC fue 46.20±1.03 %. Las variaciones en CC deben considerarse para mejorar la precisión en las estimaciones del contenido de C en los árboles y bosques tropicales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract All terrestrial ecosystems, but especially tropical forests, are important to mitigate global climate change since they absorb and store CO2 in biomass form in the trees. The identification of the carbon concentration (CC) in tree species contributes to improve the estimations of carbon (C) when the aim is to make estimations in relatively large areas. The objective of this study was to determine and compare the CC in three tropical species of trees: Alchornea latifolia Sw, Cupania dentata DC. and Inga punctata Willd. from the Sierra Sur of Oaxaca, México. Therefore, the CC was measured in the stem, branches and leaves in trees of different diameters. For each species, three individuals were selected in three diametric categories CD I (less than 10 cm), CD II (between 10 and 20 cm) and CD III (between 21 and 35 cm) from which samples were obtained for the structural components. The CC expressed in percentage of biomass was determined in a Shimadzu TOC 5000-A total carbon automatic analyzer. The data were analyzed with ANOVA for a completely random design and the means were compared with the Tukey test (p&#8804;0.05). The CC in the structural components and diametrical categories in the three species were lower than the value that was accepted generically of 50 %. The lowest CC was found in the stem of the CD I of I. punctata, with 44.82 %, and the highest was in the leaves of CD III of C. dentata with 47.72 %. The general mean of CC was 46.20±1.03 %. The variations in CC should be taken into account to improve the accuracy in the estimations of the content of C in tropical trees and forests.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[bosque tropical subperennifolio]]></kwd>
<kwd lng="es"><![CDATA[biomasa]]></kwd>
<kwd lng="es"><![CDATA[captura de carbono]]></kwd>
<kwd lng="es"><![CDATA[componentes estructurales]]></kwd>
<kwd lng="es"><![CDATA[categorías diamétricas]]></kwd>
<kwd lng="en"><![CDATA[tropical sub-evergreen forest]]></kwd>
<kwd lng="en"><![CDATA[biomass]]></kwd>
<kwd lng="en"><![CDATA[carbon capture]]></kwd>
<kwd lng="en"><![CDATA[structural components]]></kwd>
<kwd lng="en"><![CDATA[diametrical categories]]></kwd>
</kwd-group>
</article-meta>
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