<?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 CFORES]]></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>S2310-34692023000200001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de modelos de perfil del fuste de Brachystegia floribunda (BENTH)]]></article-title>
<article-title xml:lang="pt"><![CDATA[Avaliação de modelos de perfil de caule de Brachystegia floribunda (BENTH)]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of stem profile models of the species Brachystegia floribunda (BENTH)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aldana Pereira]]></surname>
<given-names><![CDATA[Edilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lores Pèrez]]></surname>
<given-names><![CDATA[Yordan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Frías Tamayo]]></surname>
<given-names><![CDATA[Marisela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Pinar del Rio "Hermanos Saiz Montes de Oca".  ]]></institution>
<addr-line><![CDATA[Pinar del Río ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Guantánamo Facultad de Agronomía y Forestal ]]></institution>
<addr-line><![CDATA[Guantánamo ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2023</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2310-34692023000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2310-34692023000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2310-34692023000200001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUNEN Brachystegia floribunda (BENTH) tiene un alto valor económico y social para las comunidades campesinas de Angola y varios países africanos. Las funciones de ahusamiento o perfil del fuste permiten estimar el diámetro y/o el volumen a una altura determinada del árbol, siendo, por tanto, una de las características dendrométricas que define la forma del fuste de las especies forestales. De ahí es que el presente trabajo persigue evaluar diferentes modelos matemáticos y determinar el de mejor ajuste para la estimación de diámetros y volumen de esta especie. En total, se derribaron y cubicaron rigurosamente 66 árboles, de los cuales fueron utilizados 53 para ajustar las ecuaciones de perfil del fuste y 13 se emplearon para la validación de los resultados obtenidos. Fueron evaluados 13 modelos de perfil del fuste y el ajuste se examinó a partir de la comparación del coeficiente de determinación, la raíz del error medio cuadrático y un índice de precisión. El modelo no lineal de Clutter resultó ser el de mejor precisión y, mediante su integración matemática permite obtener una expresión del ahusamiento del fuste compatible con el volumen comercial y total del arbolado en pie. Esta ecuación es recomendada para estimar el diámetro y altura por sección del fuste, así como, el volumen comercial y total de la especie estudiada.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO A Brachystegia floribunda (BENTH) tem um alto valor econômico e social para as comunidades rurais de Angola e de vários países africanos. As funções de taper ou perfil do fuste permitem estimar o diâmetro e/ou o volume a uma determinada altura da árvore, sendo, portanto, uma das características dendrométricas que definem a forma do fuste das espécies florestais. Assim, o presente trabalho tem como objetivo avaliar diferentes modelos matemáticos e determinar o melhor ajuste para a estimativa de diâmetros e volumes dessa espécie. No total, 66 árvores foram abatidas e cubadas rigorosamente, das quais 53 foram utilizadas para ajustar as equações de perfil do fuste e 13 foram utilizadas para validação dos resultados obtidos. Treze modelos de perfil do fuste foram avaliados e o ajuste foi examinado pela comparação do coeficiente de determinação, do erro quadrático médio e de um índice de precisão. O modelo não linear de Clutter foi considerado o mais preciso e, por meio de sua integração matemática, permite obter uma expressão da conicidade do tronco compatível com o volume comercial e o volume total em pé. Essa equação é recomendada para estimar o diâmetro e a altura por seção do caule, bem como o volume comercial e total das espécies estudadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY Brachystegia floribunda (BENTH) has a high economic and social value for the peasant communities of Angola and several African countries. The stem taper or profile functions make it possible to estimate the diameter and/or volume at a given height of the tree, being, therefore, one of the dendrometric characteristics that defines the shape of the stem of forest species. Hence, the present study seeks to evaluate different mathematical models and determine the one with the best fit for the estimation of diameters and volume of this species. In total, 66 trees were felled and rigorously boxed, of which 53 were used to adjust the stem profile equations and 13 were used to validate the results obtained. Thirteen stem profile models were evaluated and the fit was examined from the comparison of the coefficient of determination, the root mean square error and a precision index. The Clutter non-linear model turned out to be the one with the best precision and, through its mathematical integration, allows obtaining an expression of the taper of the stem compatible with the commercial and total volume of standing trees. This equation is recommended to estimate the diameter and height per section of the stem, as well as the commercial and total volume of the studied species.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ahusamiento del fuste]]></kwd>
<kwd lng="es"><![CDATA[estimación volumétrica]]></kwd>
<kwd lng="es"><![CDATA[modelo de Clutter]]></kwd>
<kwd lng="es"><![CDATA[perfil del fuste]]></kwd>
<kwd lng="es"><![CDATA[Factor de Forma]]></kwd>
<kwd lng="es"><![CDATA[Cociente de Forma]]></kwd>
<kwd lng="es"><![CDATA[Brachystegia floribunda.]]></kwd>
<kwd lng="pt"><![CDATA[Conicidade do fuste]]></kwd>
<kwd lng="pt"><![CDATA[estimativa de volume]]></kwd>
<kwd lng="pt"><![CDATA[modelo de Clutter]]></kwd>
<kwd lng="pt"><![CDATA[perfil do fuste]]></kwd>
<kwd lng="pt"><![CDATA[fator de forma]]></kwd>
<kwd lng="pt"><![CDATA[quociente de forma]]></kwd>
<kwd lng="pt"><![CDATA[Brachystegia floribunda.]]></kwd>
<kwd lng="en"><![CDATA[Stem taper]]></kwd>
<kwd lng="en"><![CDATA[volumetric estimation]]></kwd>
<kwd lng="en"><![CDATA[Clutter model]]></kwd>
<kwd lng="en"><![CDATA[Stem profile]]></kwd>
<kwd lng="en"><![CDATA[Shape Factor]]></kwd>
<kwd lng="en"><![CDATA[Shape Quotient]]></kwd>
<kwd lng="en"><![CDATA[Brachystegia floribunda.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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