Density of Araucaria angustifolia wood from overstocked stand

Detalhes bibliográficos
Autor(a) principal: Curto, Rafaella De Angeli
Data de Publicação: 2021
Outros Autores: Mattos, Patricia Póvoa de, Braz, Evaldo Muñoz, Netto, Sylvio Pellico, Zachow, Randolf
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Florestal Brasileira (Online)
Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/963
Resumo: The aim of this work was to evaluate the radial and longitudinal variations of wood specific gravity in an overstocked stand of Araucaria angustifolia, with 65 years. The stand was located in the National Forest of Açungui, Campo Largo, Parana State, Brazil, with thinning recorded between 1970 and 1980, without subsequent thinnings. We selected three trees for each diameter class: 10-30 cm, 30-50 cm and 50-70 cm. To the longitudinal analysis, we collected discs from seven heights (0, 20, 40, 60, 80 and 100% of commercial stem and at 1.3 m). The barks were removed and it was obtained opposite wedges until pith and five samples were taken in radial direction from each disk. In general, there was an increase of wood specific gravity in radial direction. The average differed significantly along the stem, with decreasing trend of wood specific gravity in the longitudinal direction. However, average specific gravity at 60% of commercial height was higher than at 40%, than reducing to the top, indicating effect of competition that occurred in the area. The no uniform wood along stem indicates negative effects of the lack of management in the stand.
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spelling Density of Araucaria angustifolia wood from overstocked standMassa específica básica da madeira de Araucaria angustifolia em povoamento superestocadoQuality of woodRadial and longitudinal variationsCompetitionQualidade da madeiraVariações radial e longitudinalCompetiçãoThe aim of this work was to evaluate the radial and longitudinal variations of wood specific gravity in an overstocked stand of Araucaria angustifolia, with 65 years. The stand was located in the National Forest of Açungui, Campo Largo, Parana State, Brazil, with thinning recorded between 1970 and 1980, without subsequent thinnings. We selected three trees for each diameter class: 10-30 cm, 30-50 cm and 50-70 cm. To the longitudinal analysis, we collected discs from seven heights (0, 20, 40, 60, 80 and 100% of commercial stem and at 1.3 m). The barks were removed and it was obtained opposite wedges until pith and five samples were taken in radial direction from each disk. In general, there was an increase of wood specific gravity in radial direction. The average differed significantly along the stem, with decreasing trend of wood specific gravity in the longitudinal direction. However, average specific gravity at 60% of commercial height was higher than at 40%, than reducing to the top, indicating effect of competition that occurred in the area. The no uniform wood along stem indicates negative effects of the lack of management in the stand.O objetivo do presente trabalho foi avaliar as variações radiais e longitudinais de massa específica básica da madeira em um plantio superestocado com 65 anos de Araucaria angustifolia. O plantio, localizado na Floresta Nacional de Açungui, Campo Largo, PR, foi desbastado entre 1970 e 1980, não havendo registros de desbastes posteriores a essa data. Foram selecionadas três árvores para cada classe de diâmetro: 10-30 cm, 30-50 cm e 50-70 cm. Para a análise longitudinal, foram seccionados discos em sete alturas (0, 20, 40, 60, 80 e 100% da altura comercial e a 1,3 m do solo), sendo removidas as cascas e retiradas duas cunhas opostas até a medula e cinco corpos de prova no sentido radial de cada disco. Em geral, na direção radial houve aumento da massa específica. As médias da massa específica diferiram estatisticamente ao longo do fuste, com diminuição da massa específica na direção longitudinal. No entanto, a massa específica média a 60% da altura comercial foi maior do que a 40%, com redução a partir dessa altura em direção ao topo, indicando efeito da competição que ocorreu na área. A desuniformidade da madeira ao longo do fuste é um indicativo dos efeitos negativos da falta de manejo na área.Embrapa Florestas2021-11-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/96310.4336/2016.pfb.36.85.963Pesquisa Florestal Brasileira; v. 36 n. 85 (2016): jan./mar.; 51-59Pesquisa Florestal Brasileira; Vol. 36 No. 85 (2016): jan./mar.; 51-591983-26051809-3647reponame:Pesquisa Florestal Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/963/469Copyright (c) 2016 Rafaella De Angeli Curto, Patricia Póvoa de Mattos, Evaldo Muñoz Braz, Sylvio Pellico Netto, Randolf Zachowhttps://creativecommons.org/licenses/by-nc-nd/4.0info:eu-repo/semantics/openAccessCurto, Rafaella De AngeliMattos, Patricia Póvoa deBraz, Evaldo MuñozNetto, Sylvio PellicoZachow, Randolf2021-11-17T13:34:26Zoai:pfb.cnpf.embrapa.br/pfb:article/963Revistahttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/PUBhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/oaipfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br1983-26051809-3647opendoar:2021-11-17T13:34:26Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Density of Araucaria angustifolia wood from overstocked stand
Massa específica básica da madeira de Araucaria angustifolia em povoamento superestocado
title Density of Araucaria angustifolia wood from overstocked stand
spellingShingle Density of Araucaria angustifolia wood from overstocked stand
Curto, Rafaella De Angeli
Quality of wood
Radial and longitudinal variations
Competition
Qualidade da madeira
Variações radial e longitudinal
Competição
title_short Density of Araucaria angustifolia wood from overstocked stand
title_full Density of Araucaria angustifolia wood from overstocked stand
title_fullStr Density of Araucaria angustifolia wood from overstocked stand
title_full_unstemmed Density of Araucaria angustifolia wood from overstocked stand
title_sort Density of Araucaria angustifolia wood from overstocked stand
author Curto, Rafaella De Angeli
author_facet Curto, Rafaella De Angeli
Mattos, Patricia Póvoa de
Braz, Evaldo Muñoz
Netto, Sylvio Pellico
Zachow, Randolf
author_role author
author2 Mattos, Patricia Póvoa de
Braz, Evaldo Muñoz
Netto, Sylvio Pellico
Zachow, Randolf
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Curto, Rafaella De Angeli
Mattos, Patricia Póvoa de
Braz, Evaldo Muñoz
Netto, Sylvio Pellico
Zachow, Randolf
dc.subject.por.fl_str_mv Quality of wood
Radial and longitudinal variations
Competition
Qualidade da madeira
Variações radial e longitudinal
Competição
topic Quality of wood
Radial and longitudinal variations
Competition
Qualidade da madeira
Variações radial e longitudinal
Competição
description The aim of this work was to evaluate the radial and longitudinal variations of wood specific gravity in an overstocked stand of Araucaria angustifolia, with 65 years. The stand was located in the National Forest of Açungui, Campo Largo, Parana State, Brazil, with thinning recorded between 1970 and 1980, without subsequent thinnings. We selected three trees for each diameter class: 10-30 cm, 30-50 cm and 50-70 cm. To the longitudinal analysis, we collected discs from seven heights (0, 20, 40, 60, 80 and 100% of commercial stem and at 1.3 m). The barks were removed and it was obtained opposite wedges until pith and five samples were taken in radial direction from each disk. In general, there was an increase of wood specific gravity in radial direction. The average differed significantly along the stem, with decreasing trend of wood specific gravity in the longitudinal direction. However, average specific gravity at 60% of commercial height was higher than at 40%, than reducing to the top, indicating effect of competition that occurred in the area. The no uniform wood along stem indicates negative effects of the lack of management in the stand.
publishDate 2021
dc.date.none.fl_str_mv 2021-11-17
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
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dc.identifier.uri.fl_str_mv https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/963
10.4336/2016.pfb.36.85.963
url https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/963
identifier_str_mv 10.4336/2016.pfb.36.85.963
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/963/469
dc.rights.driver.fl_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Embrapa Florestas
publisher.none.fl_str_mv Embrapa Florestas
dc.source.none.fl_str_mv Pesquisa Florestal Brasileira; v. 36 n. 85 (2016): jan./mar.; 51-59
Pesquisa Florestal Brasileira; Vol. 36 No. 85 (2016): jan./mar.; 51-59
1983-2605
1809-3647
reponame:Pesquisa Florestal Brasileira (Online)
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instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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reponame_str Pesquisa Florestal Brasileira (Online)
collection Pesquisa Florestal Brasileira (Online)
repository.name.fl_str_mv Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br
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