INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/340 |
Resumo: | This work tried to evaluate the influence of different intensities of pruning on the density of air-dried wood and the basic density of the first thinning wood of Pinus elliottii Engelm. In order to achieve this goal, three replacement blocks were used randomly, set on a ten-year old stand, where five treatments were analyzed: T1 – with no pruning; T2 – dry pruning; T3 – 40% pruning ; T4 – 50%; and T5 – 60% of the total canopy height, respectively. In each experimental unity, three trees were sampled. “The density of air-dried wood was obtained from specimens of 4 x 4 x 20 cm, and the basic density was determined through disks taken at 0.10 meters of height from the sample trees. The data analysis of density of air-dried wood did not show any significant linear regression, at a 5% significance level. Comparison of treatment means, made through orthogonal contrasts, did not show any significant differences between the treatments either. The wood basic density showed some growing trend throughout the ages in all of the treatments, which was proved through regression equation fitting. In T1 and T3 treatments, the basic density seems to have kept stabilized around 8 years old, while in the others it still reveals increasing throughout the ages. |
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INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii EngelmInfluência da desrama sobre a densidade da madeira de primeiro desbaste de Pinus elliottii Engelm.Pinus elliottiipruningdensity of woodwood quality.This work tried to evaluate the influence of different intensities of pruning on the density of air-dried wood and the basic density of the first thinning wood of Pinus elliottii Engelm. In order to achieve this goal, three replacement blocks were used randomly, set on a ten-year old stand, where five treatments were analyzed: T1 – with no pruning; T2 – dry pruning; T3 – 40% pruning ; T4 – 50%; and T5 – 60% of the total canopy height, respectively. In each experimental unity, three trees were sampled. “The density of air-dried wood was obtained from specimens of 4 x 4 x 20 cm, and the basic density was determined through disks taken at 0.10 meters of height from the sample trees. The data analysis of density of air-dried wood did not show any significant linear regression, at a 5% significance level. Comparison of treatment means, made through orthogonal contrasts, did not show any significant differences between the treatments either. The wood basic density showed some growing trend throughout the ages in all of the treatments, which was proved through regression equation fitting. In T1 and T3 treatments, the basic density seems to have kept stabilized around 8 years old, while in the others it still reveals increasing throughout the ages. Nesse trabalho buscou-se avaliar a influência de diferentes intensidades de desrama sobre a densidade da madeira seca ao ar e densidade básica da madeira de primeiro desbaste de Pinus elliottii E. Para tanto, utilizou-se dados de um experimento em blocos ao acaso com três repetições, instalado em povoamento com 10 anos de idade, onde foram avaliados 5 tratamentos: T1 - sem desrama; T2 - desrama seca; T3 - desrama de 40% da altura total; T4 - desrama de 50% da altura total; e T5 - desrama de 60% da altura total. Em cada unidade experimental foram amostradas 3 árvores. A densidade da madeira seca ao ar foi obtida a partir de corpos de prova de 4 x 4 x 20 cm, e, para a determinação da densidade básica, foram utilizados discos retirados a 0,10 m de altura nas árvores amostradas. Na análise dos dados de densidade da madeira seca ao ar não foram encontradas regressões significativas, a um nível de 5% de significância, assim como não houve diferença significativa entre as médias dos tratamentos. A densidade básica da madeira apresentou tendência de aumento com o aumento da idade das árvores em todos os tratamentos, o que foi comprovado através do ajuste de equações de regressão. Nos tratamentos T1 e T3 a densidade básica aparenta ter se estabilizado em torno dos 8 anos de idade, enquanto nos demais tratamentos ainda apresenta aumento com a idade.Universidade Federal de Santa Maria1997-03-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/34010.5902/19805098340Ciência Florestal; Vol. 7 No. 1 (1997); 77-89Ciência Florestal; v. 7 n. 1 (1997); 77-891980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/340/211Schilling, Ana CristinaSchneider, Paulo RenatoHaselein, Clóvis RobertoFinger, César Augusto Guimarãesinfo:eu-repo/semantics/openAccess2017-10-10T14:20:29Zoai:ojs.pkp.sfu.ca:article/340Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-10-10T14:20:29Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm Influência da desrama sobre a densidade da madeira de primeiro desbaste de Pinus elliottii Engelm. |
title |
INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm |
spellingShingle |
INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm Schilling, Ana Cristina Pinus elliottii pruning density of wood wood quality. |
title_short |
INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm |
title_full |
INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm |
title_fullStr |
INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm |
title_full_unstemmed |
INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm |
title_sort |
INFLUENCE OF PRUNING ON WOOD DENSITY OF FIRST THINNING OF Pinus elliottii Engelm |
author |
Schilling, Ana Cristina |
author_facet |
Schilling, Ana Cristina Schneider, Paulo Renato Haselein, Clóvis Roberto Finger, César Augusto Guimarães |
author_role |
author |
author2 |
Schneider, Paulo Renato Haselein, Clóvis Roberto Finger, César Augusto Guimarães |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Schilling, Ana Cristina Schneider, Paulo Renato Haselein, Clóvis Roberto Finger, César Augusto Guimarães |
dc.subject.por.fl_str_mv |
Pinus elliottii pruning density of wood wood quality. |
topic |
Pinus elliottii pruning density of wood wood quality. |
description |
This work tried to evaluate the influence of different intensities of pruning on the density of air-dried wood and the basic density of the first thinning wood of Pinus elliottii Engelm. In order to achieve this goal, three replacement blocks were used randomly, set on a ten-year old stand, where five treatments were analyzed: T1 – with no pruning; T2 – dry pruning; T3 – 40% pruning ; T4 – 50%; and T5 – 60% of the total canopy height, respectively. In each experimental unity, three trees were sampled. “The density of air-dried wood was obtained from specimens of 4 x 4 x 20 cm, and the basic density was determined through disks taken at 0.10 meters of height from the sample trees. The data analysis of density of air-dried wood did not show any significant linear regression, at a 5% significance level. Comparison of treatment means, made through orthogonal contrasts, did not show any significant differences between the treatments either. The wood basic density showed some growing trend throughout the ages in all of the treatments, which was proved through regression equation fitting. In T1 and T3 treatments, the basic density seems to have kept stabilized around 8 years old, while in the others it still reveals increasing throughout the ages. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-03-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/340 10.5902/19805098340 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/340 |
identifier_str_mv |
10.5902/19805098340 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/340/211 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 7 No. 1 (1997); 77-89 Ciência Florestal; v. 7 n. 1 (1997); 77-89 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944124815638528 |