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  <titleInfo>
    <title>Longitudinal variation of wood quality in the five forest species from Caatinga</title>
  </titleInfo>
  <name type="personal">
    <namePart>Batista, Felipe Gomes</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
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  <name type="personal">
    <namePart>Melo, Rafael Rodolfo de</namePart>
    <role>
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  <name type="personal">
    <namePart>Medeiros, Dayane Targino de</namePart>
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      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
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  <name type="personal">
    <namePart>Oliveira, Antônio Giliard dos Santos</namePart>
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    </role>
  </name>
  <name type="personal">
    <namePart>Freitas, Cirilo Berson Alves</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Silva, Erick Daniel Gomes da</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
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  </name>
  <name type="personal">
    <namePart>Pimenta, Alexandre Santos</namePart>
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  <genre authority="marc">periodical</genre>
  <genre authority="marc">abstract or summary</genre>
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    <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
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  <abstract>


ABSTRACT:      The present study aimed to evaluate the dendrometric and chemical characteristics and variation of basic density and moisture content (green) of the wood of five Caatinga forest species along the commercial longitudinal direction (base-top) of  logs.  The  studied  species  were  pau-branco  (Auxemma  oncocalyx  (Fr.  All.)  Taub.),  jurema  preta  (Mimosa  tenuiflora  (Willd.)  Poir.), jurema-de-embira (Mimosa ophthalmocentra Mart. ex Benth.), pereiro (Aspidosperma pyrifolium Mart.) and sabiá (Mimosa caesalpiniifolia  Benth.).  Fifteen  trees  were  harvested,  three  of  each  species.  The  trees  had  diameter  at  breast  height  of  8  to  12 cm. Five disks with thickness of 10 cm were removed from each tree at the positions 0 (base), 25, 50, 75 and 100% of the commercial height. The dendrometric characteristics showed that the choices of the trees contributed to a better analysis of the physicochemical properties of the wood. The five studied species could be described by the same model of longitudinal variation of basic density, decreasing from the base to top, while the moisture content (green) presented inverse behavior, with an increase in this same direction. All species had good quality for the production of sawn lumber, veneers, firewood and charcoal. In the chemical composition, the wood presented constituents that convey natural durability, as well as use for energy purposes.  



Key words:      basic density, physical properties, top base variation</abstract>
  <abstract>


RESUMO:      O presente estudo teve como objetivo avaliar as características dendrométricas, químicas e a variação da massa específica básica e teor de umidade (verde), na madeira de cinco espécies florestais da Caatinga no sentido longitudinal (base-topo) do fuste comercial. As espécies estudadas foram pau branco (Auxemma oncocalyx (Fr. All.) Taub.), jurema preta (Mimosa tenuiflora (Willd.) Poir.), jurema-de-embira (Mimosa ophthalmocentra Mart. ex Benth.), pereiro (Aspidosperma pyrifolium Mart.) e  sabiá  (Mimosa  caesalpiniifolia  Benth.).  Foram  colhidas  quinze  árvores,  três  para  cada  espécie.  As  árvores  apresentavam  diâmetro  à  altura  do  peito  de  8  a  12  cm.  De  cada  uma  delas  foram  retirados  cinco  discos  com  10  cm  de  espessura  nas  posições  a  0  (base),  25,  50,  75  e  100%  da  altura  comercial  do  fuste.  As  características  dendrométricas,  evidenciaram  que  as  escolhas  das  árvores,  contribuíram  para  uma  melhor  análise  das  propriedades  físico-químicas  das  madeiras.  As  cinco  espécies estudadas apresentaram o mesmo modelo de variação longitudinal da massa específica básica, diminuindo da base para o topo, enquanto o teor de umidade (verde) teve comportamento inverso, com acréscimo nesse mesmo sentido. Todas as espécies apresentaram boa qualidade para produção de estacas, mourões, lenha e carvão. Na composição química, às madeiras apresentaram constituintes que influencia para uma melhor durabilidade natural, bem como para fins energéticos.       



Palavras-chave:      massa específica básica; propriedades físicas; variação base topo</abstract>
  <note>

Publicação online; 28 ref.; 4 illus.; Summaries (En, Pt)</note>
  <subject>
    <topic>ESSÊNCIA FLORESTAL</topic>
  </subject>
  <subject>
    <topic>MADEIRA</topic>
  </subject>
  <subject>
    <topic>QUALIDADE</topic>
  </subject>
  <subject>
    <topic>PROPRIEDADE FÍSICO-QUÍMICA</topic>
  </subject>
  <subject>
    <topic>CAATINGA</topic>
  </subject>
  <relatedItem type="host">
    <titleInfo>
      <title>Revista Brasileira de Ciências Agrárias (Brazil)</title>
    </titleInfo>
    <originInfo>
      <publisher>Recife-PE Universidade Federal Rural de Pernambuco 2006</publisher>
    </originInfo>
    <identifier>2026-1925</identifier>
    <identifier type="issn">1981-1160</identifier>
    <identifier type="local">BR2026000576</identifier>
    <part>
      <text>v. 15(4) p. 1-9; (2020)</text>
    </part>
  </relatedItem>
  <identifier type="uri">http://www.agraria.pro.br/ojs32/index.php/RBCA/article/view/v15i4a8572/14</identifier>
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    <url>http://www.agraria.pro.br/ojs32/index.php/RBCA/article/view/v15i4a8572/14</url>
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    <recordCreationDate encoding="marc">260511</recordCreationDate>
    <recordChangeDate encoding="iso8601">20260511150037.0</recordChangeDate>
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      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
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