<?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>2007-1132</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. forestales]]></abbrev-journal-title>
<issn>2007-1132</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11322019000100107</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v10i51.311</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores de expansión y sistema de partición de biomasa aérea para Pinus chiapensis (Martínez) Andresen]]></article-title>
<article-title xml:lang="en"><![CDATA[Expansion factors and system partition of aerial biomass for Pinus chiapensis (Martínez) Andresen]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Angel]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De los Santos Posadas]]></surname>
<given-names><![CDATA[Héctor Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fierros González]]></surname>
<given-names><![CDATA[Aurelio Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fierros Mateo]]></surname>
<given-names><![CDATA[Reynol]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Miranda]]></surname>
<given-names><![CDATA[Ramiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Ramos]]></surname>
<given-names><![CDATA[Adrián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Ramos]]></surname>
<given-names><![CDATA[Jonathan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP Centro Nacional de Investigación Disciplinaria en Conservación y Mejoramiento de Ecosistemas Forestales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Posgrado en Ciencias Forestales Campus Montecillo]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,INIFAP Campo Experimental Saltillo CIR Norte Centro]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,INIFAP Campo Experimental Chetumal CIR Sureste]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>10</volume>
<numero>51</numero>
<fpage>107</fpage>
<lpage>132</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322019000100107&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322019000100107&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322019000100107&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En el presente estudio se desarrollaron factores de expansión para biomasa constante y variable, además de un sistema de partición de biomasa aérea en plantaciones forestales comerciales de Pinus chiapensis. Mediante un muestreo destructivo de 35 árboles, se obtuvo el peso fresco de fuste, ramas y follaje en el campo y se tomaron muestras para determinar su peso seco. La relación del peso seco y fresco se empleó para convertir el peso freso en biomasa. A partir de una proporción directa del volumen total del fuste multiplicada por un factor de expansión de biomasa constante se estimó la biomasa aérea. El factor de expansión de biomasa variable se determinó con base en el cociente del modelo de biomasa aérea total y del volumen total del fuste. El sistema de partición de biomasa aérea se ajustó como una función directa de la biomasa y un factor de partición, que define la proporción de la biomasa por componentes. El valor del factor de expansión de biomasa constante reveló que por cada metro cúbico existen 709 kg de biomasa. El sistema de partición de biomasa aérea indicó una distribución de biomasa mayor en el fuste con 69 %, de ramas con 21 % y de follaje con 10 %. La aplicación de los factores de expansión de biomasa y sistema de partición de biomasa aérea permiten calcular la biomasa aérea total y por componentes a partir del volumen total del fuste de los árboles medidos en los inventarios forestales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In the present study, expansion factors for constant and variable biomass were developed, as well as an aerial biomass partition system in commercial forest plantations of Pinus chiapensis. By means of a destructive sampling of 35 trees, the fresh weight of stems, branches and foliage in the field was obtained and samples were taken to determine their dry weight. The ratio of the dry and fresh weight was used to convert the green weight into biomass. The aerial biomass was estimated from a direct proportion of the total volume of the stem multiplied by a constant biomass expansion factor. The variable biomass expansion factor was determined based on the quotient of the total aerial biomass model and the total volume of the stem. The aerial biomass partition system was fitted as a direct function of the biomass and a partition factor, which defines the proportion of the biomass by components. The value of the constant biomass expansion factor revealed that for each cubic meter there are 709 kg of biomass. The system of aerial biomass partition indicated a greater biomass distribution in the stem with 69 %, of branches with 21 % and of foliage with 10 %. The application of the biomass expansion factors and the aerial biomass partition system allow us to calculate the total aerial biomass and by components from the total stem volume of the trees measured in the forest inventories.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Biomasa forestal]]></kwd>
<kwd lng="es"><![CDATA[componentes estructurales]]></kwd>
<kwd lng="es"><![CDATA[ecuaciones alométricas]]></kwd>
<kwd lng="es"><![CDATA[Pinus chiapensis (Martínez) Andresen]]></kwd>
<kwd lng="es"><![CDATA[plantaciones forestales]]></kwd>
<kwd lng="es"><![CDATA[volumen total fuste]]></kwd>
<kwd lng="en"><![CDATA[Forest biomass]]></kwd>
<kwd lng="en"><![CDATA[structural components]]></kwd>
<kwd lng="en"><![CDATA[allometric equations]]></kwd>
<kwd lng="en"><![CDATA[Pinus chiapensis (Martínez) Andresen]]></kwd>
<kwd lng="en"><![CDATA[forest plantations]]></kwd>
<kwd lng="en"><![CDATA[total stem volume]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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