<?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>2310-3469</journal-id>
<journal-title><![CDATA[Revista Cubana de Ciencias Forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev cubana ciencias forestales]]></abbrev-journal-title>
<issn>2310-3469</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Pinar del Río Hermanos Saíz Montes de Oca]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2310-34692018000100003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estimación del diámetro fustal sobre el cilindro nudoso central en trozas basales de roble, Chile]]></article-title>
<article-title xml:lang="en"><![CDATA[Estimation of the fustal diameter on the central knotty cylinder in oak basal logs, Chile]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corvalán Vera]]></surname>
<given-names><![CDATA[Patricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Chile Facultad Ciencia Forestales y de la Conservación de la Naturaleza Departamento Gestión Forestal y de su Medio Ambiente]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>6</volume>
<numero>1</numero>
<fpage>3</fpage>
<lpage>14</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2310-34692018000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2310-34692018000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2310-34692018000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Con el objetivo de determinar el diámetro del cilindro nudoso central, tanto vivo como muerto, se muestreó un total de 60 árboles pertenecientes al cuartil superior de clases diamétricas en renovales no manejados de N. obliqua de la precordillera de Maule. Se asume que estos quedan determinados por la rama viva y muerta más baja, presente en altura del árbol, respectivamente. Se analizaron las relaciones existentes entre el diámetro del cilindro nudoso central y los diámetros en el extremo menor de trozas de 1.2, 2.4 y 3.6 m. sobre el tocón, el diámetro normal y la altura de inserción de la primera rama. Del análisis, se deduce que: 1) el diámetro del cilindro nudoso central vivo y muerto aumentan linealmente con el diámetro normal del árbol, 2) que el diámetro en el extremo menor de las trozas aumenta en la medida que este lo hace y disminuye en la medida que aumenta en altura sobre el suelo y 3) que el diámetro fustal sobre el cilindro nudoso central muerto aumenta linealmente con el diámetro normal y la altura de inserción de la rama muerta más baja del árbol, lo que permite determinar la zona de oclusión de los nudos del árbol.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In order to determine the diameter of the central knotted cylinder both alive and dead, a total of 60 trees belonging to the upper quartile of diametric classes in unmanaged renewal of N. obliqua from the Maule foothills were sampled. It is assumed that these are determined by the lowest living and dead branch present in tree height, respectively. We analyzed the relationships between the diameter of the central knotty cylinder, and the diameters at the lower end of logs 1.2, 2.4 and 3.6 m above the stump, the normal diameter and the insertion height of the first branch. From the analysis it is deduced that: i) the diameter of the live and dead central knotted cylinder increases linearly with the normal diameter of the tree, ii) that the diameter at the smaller end of the logs increases as it does and decreases as increases in height above the ground and iii) that the fustal diameter on the dead central knotty cylinder increases linearly with the normal diameter and the insertion height of the lowest dead branch of the tree, allowing to determine the zone of occlusion of the knots of the tree.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[nudos]]></kwd>
<kwd lng="es"><![CDATA[trozas]]></kwd>
<kwd lng="es"><![CDATA[diámetro del fuste]]></kwd>
<kwd lng="es"><![CDATA[ramas vivas y muertas]]></kwd>
<kwd lng="en"><![CDATA[knots]]></kwd>
<kwd lng="en"><![CDATA[logs]]></kwd>
<kwd lng="en"><![CDATA[diameter of the shaft]]></kwd>
<kwd lng="en"><![CDATA[live and dead branches]]></kwd>
</kwd-group>
</article-meta>
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