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  <leader>04235nab a2200301 i 4500</leader>
  <controlfield tag="003">BR-BrBNA</controlfield>
  <controlfield tag="005">20240418154930.0</controlfield>
  <controlfield tag="008">240418b2019    bl.qr|pooa||| 00| 0 por |</controlfield>
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    <subfield code="a">K10</subfield>
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    <subfield code="a">Ferreira, Juliana Ceccato </subfield>
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    <subfield code="a">St&#xE4;helin, Thielly Schmidt Furtado</subfield>
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    <subfield code="a">Jesus, M&#xE1;rcia Silva de</subfield>
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    <subfield code="a">Mu&#xF1;iz, Graciela In&#xEA;s Bolzon de</subfield>
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    <subfield code="a">Brand, Martha Andreia</subfield>
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  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="a">Freitas, Tha&#xED;s Pereira</subfield>
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  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">Estimativa da oferta de biomassa florestal em povoamentos de Pinus taeda L. ap&#xF3;s interven&#xE7;&#xF5;es culturais</subfield>
  </datafield>
  <datafield tag="500" ind1=" " ind2=" ">
    <subfield code="a">Publica&#xE7;&#xE3;o on-line; 26 ref.; 4 tables; Summaries (En, Pt)</subfield>
  </datafield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">

Resumo

Com a determina&#xE7;&#xE3;o do quanto de biomassa florestal &#xE9; gerada ap&#xF3;s as interven&#xE7;&#xF5;es culturais &#xE9; poss&#xED;vel
definir as &#xE1;reas pass&#xED;veis de explora&#xE7;&#xE3;o. Com isso, o objetivo do trabalho foi quantificar e estimar a oferta
de biomassa de Pinus taeda L. dispon&#xED;vel ap&#xF3;s as interven&#xE7;&#xF5;es culturais. O experimento foi realizado em
reflorestamentos nos munic&#xED;pios dos estados do Paran&#xE1; e Santa Catarina, com idades de 3 anos (primeira
desrama), 5 anos (segunda desrama), 7 anos (terceira desrama), 11 anos (primeiro desbaste) 19 anos (segundo
desbaste), 23 e 33 anos (cortes rasos). Para cada idade foram amostradas 10 &#xE1;rvores e quantificados os
componentes ac&#xED;culas, galhos, ponteira e casca. Ap&#xF3;s o corte raso, aos 23 anos houve maior disponibilidade
de biomassa individual (372,6 kg.&#xE1;rv-1) e por unidade de &#xE1;rea (144,4 t.ha-1), sendo composto principalmente
por galhos (69,3%), seguido das ac&#xED;culas (17,9%), casca (11,0%) e ponteira (1,8%) por unidade de &#xE1;rea. A
correla&#xE7;&#xE3;o entre a massa dos componentes da biomassa por &#xE1;rvore e as vari&#xE1;veis independentes foi
significativa e superior a 0,52. A menor correla&#xE7;&#xE3;o foi observada entre estas e a quantidade ofertada de
ponteiras. Os modelos de regress&#xE3;o selecionados para estimar a massa de biomassa em fun&#xE7;&#xE3;o das vari&#xE1;veis
independentes tiveram R&#xB2;aju superiores a 83%, baixos desvios padr&#xF5;es e coeficientes de varia&#xE7;&#xE3;o.

Palavras-chave: Quantifica&#xE7;&#xE3;o florestal; Uso m&#xFA;ltiplo das florestas; Res&#xED;duos p&#xF3;s-colheita</subfield>
  </datafield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">

Abstract

Along with the determination of how much of forest biomass is generated after the cultural interventions,
it is possible to define areas that can be exploited. Thus, the objective of this work was to quantify and
estimate the biomass supply of Pinus taeda L. available after cultural interventions. The experiment was
carried out in populations in the cities of Paran&#xE1; and Santa Catarina states, with ages of 3 years (first pruning),
5 years (second pruning), 7 years (third pruning), 11 years (first thinning), 19 years (second thinning), 23 and
33 years (harvesting). For each age, 10 trees were sampled and the components of the leaves, twigs, canopy
and bark were quantified. After harvesting at 23 years old there was greater availability of individual
biomass (372.6 kg. tree-1) and per unit area (144.4 t.ha-1), being composed mainly of twigs (69.3%), followed
by leaves (17.9%), bark (11.0%) and canopy (1.8%) per unit area. The correlation between the mass of the
components of the biomass per tree and the independent variables was significant and higher to 0.52. The
lower correlation was observed between these and the mass of canopy. The regression models selected to
estimate the mass of biomass from the independent variables had R&#xB2;adju higher than 83%, low standard
deviations and low coefficients of variation.

Keywords: Forest quantification; Multiple use of forests; Post-harvest residues</subfield>
  </datafield>
  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">FLORESTA</subfield>
  </datafield>
  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">RES&#xCD;DUO</subfield>
  </datafield>
  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">BIOMASSA</subfield>
  </datafield>
  <datafield tag="773" ind1="0" ind2=" ">
    <subfield code="0">4065</subfield>
    <subfield code="9">314151</subfield>
    <subfield code="d">Santa Maria-RS Universidade Federal de Santa Maria - Centro de Pesquisas Florestais.Departamento de Ci&#xEA;ncias Florestais. Programa de P&#xF3;s-Gradua&#xE7;&#xE3;o em Engenharia Florestal 1991</subfield>
    <subfield code="o">2024-0405</subfield>
    <subfield code="t">Ci&#xEA;ncia Florestal (Brazil)</subfield>
    <subfield code="x">0103-9954; 1980-5098 (on-line)</subfield>
    <subfield code="g">v. 29(3) p. 1459-1468; (Jul-Sep 2019)</subfield>
    <subfield code="w">BR2023001694</subfield>
  </datafield>
  <datafield tag="856" ind1=" " ind2=" ">
    <subfield code="u">https://www.scielo.br/j/cflo/a/vn6cXVzsQ5xwbvRgXTydttG/?format=pdf&amp;lang=pt</subfield>
  </datafield>
  <datafield tag="942" ind1=" " ind2=" ">
    <subfield code="c">Anal&#xED;tica</subfield>
  </datafield>
  <datafield tag="999" ind1=" " ind2=" ">
    <subfield code="c">299230</subfield>
    <subfield code="d">299230</subfield>
  </datafield>
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