<?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>S2007-11322019000100133</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v10i51.407</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Modelos locales altura-diámetro para Pinus montezumae Lamb. y Pinus teocote Schiede ex Schltdl. en Nanacamilpa, Tlaxcala]]></article-title>
<article-title xml:lang="en"><![CDATA[Local height-diameter models for Pinus montezumae Lamb. and Pinus teocote Schiede ex Schltdl. in Nanacamilpa, Tlaxcala]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra-De la Cruz]]></surname>
<given-names><![CDATA[Vidal]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Islas-Gutiérrez]]></surname>
<given-names><![CDATA[Fabián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Ayala]]></surname>
<given-names><![CDATA[Eulogio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acosta-Mireles]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Buendía-Rodríguez]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrillo-Anzures]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tamarit-Urías]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pineda-Ojeda]]></surname>
<given-names><![CDATA[Tomas]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP CIR Sitio Experimental Tlaxcala]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,INIFAP CIR Centro-Campo Experimental Valle de México]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,INIFAP CIR Golfo Centro-Campo Experimental San Martinito]]></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>133</fpage>
<lpage>156</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322019000100133&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322019000100133&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322019000100133&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La medición en campo de la altura total de los árboles implica dificultades prácticas que incrementan los tiempos y costos del inventario. Además, su medición está propensa a errores, en particular en sitios con sotobosques densos. Las relaciones alométricas son una alternativa viable para estimar en forma eficiente la altura en función del diámetro normal. El objetivo de este estudio fue analizar modelos de crecimiento y alométricos para determinar el de mejor ajuste en la relación altura-diámetro para árboles de Pinus montezumae y Pinus teocote de la región forestal Nanacamilpa, Tlaxcala. Para el análisis, se obtuvieron 583 pares de datos de diámetro normal-altura total para P. montezumae y 468 pares para P. teocote. La muestra abarcó un amplio intervalo de categorías diamétricas. Se evaluaron 14 modelos no lineales y uno lineal, mediante análisis de regresión con el procedimiento MODEL de SAS® para los no lineales, y REG para el lineal. La bondad de ajuste se evaluó con base en la R  2  adj , el sesgo, la raíz del error cuadrático medio, la suma de cuadrado del error, el cuadrado medio del error y el criterio de información de Akaike. El mejor modelo para estimar la altura de Pinus montezumae fue el propuesto por Yang (M2) con una R  2  adj =0.91, y para P. teocote el cuadrático (M10) con una R  2  adj =0.87. Ambos modelos describen con precisión la relación alométrica entre el diámetro y la altura en árboles de las especies estudiadas en la región occidental del estado de Tlaxcala.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Field measurement of total height of standing trees imposes practical difficulties that increases time and costs of forest inventories. Moreover, height measurement is prone to mistakes especially in forests with dense understories. Allometric equations are a suitable option to estimate efficiently total height as a function of tree diameter. The aim of this study was to analyze allometric models to fit the total height-normal diameter relation for Pinus montezumae and P. teocote trees in the forest region of Nanacamilpa, Tlaxcala. Database consisted of 583 pairs of total height-normal diameter measurements for P. montezumae and 486 pairs for P. teocote covering a wide range of diameter classes. We evaluated 14 nonlinear and one linear models with regression analysis using the MODEL and REG procedures of SAS® respectively. Goodness of fit was assessed with R 2  adj , bias, root mean squared error, sum square error, mean square error, and Akaike&#8217;s information criterion. The best model for P. montezumae was Yang&#8217;s model (M2) with an R 2  adj =0.91, whereas the quadratic model (M10) was the best for P. teocote with an R 2  adj =0.87. Such models described with precision the relationship between height and diameter these tree species in the western region of the state of Tlaxcala.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Centro de México]]></kwd>
<kwd lng="es"><![CDATA[manejo forestal]]></kwd>
<kwd lng="es"><![CDATA[modelos de crecimiento]]></kwd>
<kwd lng="es"><![CDATA[pinos]]></kwd>
<kwd lng="es"><![CDATA[regresión no lineal]]></kwd>
<kwd lng="es"><![CDATA[relaciones alométricas]]></kwd>
<kwd lng="en"><![CDATA[Central Mexico]]></kwd>
<kwd lng="en"><![CDATA[forest management]]></kwd>
<kwd lng="en"><![CDATA[growth models]]></kwd>
<kwd lng="en"><![CDATA[pines]]></kwd>
<kwd lng="en"><![CDATA[non-linear regression]]></kwd>
<kwd lng="en"><![CDATA[allometric relations]]></kwd>
</kwd-group>
</article-meta>
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