THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/386 |
Resumo: | From a seven year old population of acacia mangium, discs were taken from the trunks of 126 trees in order to study the species’ basic density. The basic average density (DBM) found was between 0.524 + 0.076 g/cm3. The axial variation for the basic density (Db), explained according to a quadratic model (R2 = 0.83), revealed a reduction tendency of up to half of the trunk’s height, increasing from this point up to the top without reaching the Db’s value for the base. The linear model was what best explained the relation between the DBM and the Db, obtained at various positions along the trunk. In fact, this relation was even more accentuated (R2 = 0.81) at 25% of the trunk’s height. Thus, in the determining of the species’ DBM through destructive methods, samples taken at 25% of the trunk’s height can be used. Nevertheless, for non-destructive samples, the height of 25%, may be too much, and so, withdrawing a sample, using an Pressler’s cork bore, for example, may not be feasible. In this case, withdrawing from the DAP is suggested because the relation at this height is also high (0.78). |
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THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOODVariação axial da densidade básica da madeira de Acacia mangium Willd aos sete anos de idade.acacia mangiumbasic average densityand axial variation density.Acacia mangiumdensidade básica médiavariação axial da densidade.From a seven year old population of acacia mangium, discs were taken from the trunks of 126 trees in order to study the species’ basic density. The basic average density (DBM) found was between 0.524 + 0.076 g/cm3. The axial variation for the basic density (Db), explained according to a quadratic model (R2 = 0.83), revealed a reduction tendency of up to half of the trunk’s height, increasing from this point up to the top without reaching the Db’s value for the base. The linear model was what best explained the relation between the DBM and the Db, obtained at various positions along the trunk. In fact, this relation was even more accentuated (R2 = 0.81) at 25% of the trunk’s height. Thus, in the determining of the species’ DBM through destructive methods, samples taken at 25% of the trunk’s height can be used. Nevertheless, for non-destructive samples, the height of 25%, may be too much, and so, withdrawing a sample, using an Pressler’s cork bore, for example, may not be feasible. In this case, withdrawing from the DAP is suggested because the relation at this height is also high (0.78).Tomando-se por base um povoamento de Acacia mangium com 7 anos de idade, retirou-se discos ao longo do tronco de 126 árvores para o estudo da densidade básica da espécie. A densidade básica média (DBM) encontrada foi de 0,524 ± 0,076 g/cm3. A variação axial da densidade básica (Db), explicada por um modelo quadrático (R2 = 0,83), apresentou tendência de diminuição até a metade da altura do tronco, crescendo a partir daí até o topo, sem contudo atingir os valores da Db da base. O modelo linear foi o que melhor explicou a relação da DBM com a Db obtida a várias posições do tronco, mostrando-se mais acentuada (R2 = 0,81) a 25% da altura do tronco. Portanto, na determinação da DBM da espécie por métodos destrutivos, pode-se utilizar amostras retiradas à 25% da altura do tronco. No entanto, para amostragens não-destrutivas, a posição de 25% pode ser uma altura elevada e a retirada da amostra, por exemplo, utilizando um trado, pode-se tornar inviável. Nesse caso, sugere-se a retirada no DAP, pois relação, nesta posição também é alta (0,78).Universidade Federal de Santa Maria1999-06-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/38610.5902/19805098386Ciência Florestal; Vol. 9 No. 2 (1999); 85-92Ciência Florestal; v. 9 n. 2 (1999); 85-921980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/386/258Vale, Ailton Teixeira doBrasil, Maria Aparecida MourãoMartins, Ildeu Soaresinfo:eu-repo/semantics/openAccess2017-06-08T11:59:41Zoai:ojs.pkp.sfu.ca:article/386Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-06-08T11:59:41Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD Variação axial da densidade básica da madeira de Acacia mangium Willd aos sete anos de idade. |
title |
THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD |
spellingShingle |
THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD Vale, Ailton Teixeira do acacia mangium basic average density and axial variation density. Acacia mangium densidade básica média variação axial da densidade. |
title_short |
THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD |
title_full |
THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD |
title_fullStr |
THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD |
title_full_unstemmed |
THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD |
title_sort |
THE BASIC AXIAL VARIATION OF SEVEN YEAR OLD Acacia mangium WILLD WOOD |
author |
Vale, Ailton Teixeira do |
author_facet |
Vale, Ailton Teixeira do Brasil, Maria Aparecida Mourão Martins, Ildeu Soares |
author_role |
author |
author2 |
Brasil, Maria Aparecida Mourão Martins, Ildeu Soares |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Vale, Ailton Teixeira do Brasil, Maria Aparecida Mourão Martins, Ildeu Soares |
dc.subject.por.fl_str_mv |
acacia mangium basic average density and axial variation density. Acacia mangium densidade básica média variação axial da densidade. |
topic |
acacia mangium basic average density and axial variation density. Acacia mangium densidade básica média variação axial da densidade. |
description |
From a seven year old population of acacia mangium, discs were taken from the trunks of 126 trees in order to study the species’ basic density. The basic average density (DBM) found was between 0.524 + 0.076 g/cm3. The axial variation for the basic density (Db), explained according to a quadratic model (R2 = 0.83), revealed a reduction tendency of up to half of the trunk’s height, increasing from this point up to the top without reaching the Db’s value for the base. The linear model was what best explained the relation between the DBM and the Db, obtained at various positions along the trunk. In fact, this relation was even more accentuated (R2 = 0.81) at 25% of the trunk’s height. Thus, in the determining of the species’ DBM through destructive methods, samples taken at 25% of the trunk’s height can be used. Nevertheless, for non-destructive samples, the height of 25%, may be too much, and so, withdrawing a sample, using an Pressler’s cork bore, for example, may not be feasible. In this case, withdrawing from the DAP is suggested because the relation at this height is also high (0.78). |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-06-30 |
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/386 10.5902/19805098386 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/386 |
identifier_str_mv |
10.5902/19805098386 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/386/258 |
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. 9 No. 2 (1999); 85-92 Ciência Florestal; v. 9 n. 2 (1999); 85-92 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_ |
1799944124903718912 |