Hypsometrical Relation for Acacia mearnsii with Different Ages

Detalhes bibliográficos
Autor(a) principal: Caldeira, Marcos Vinicius Winckler
Data de Publicação: 2002
Outros Autores: Schumacher, Mauro Valdir, Scheeren, Luciano Weber, Barichello, Leonir Rodrigues, Watzlawick, Luciano Farinha
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Florestal Brasileira (Online)
Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1750
Resumo: This work had as objective to select mathematical models to predict the height of trees in function of DBH and age, in black wattle stands, Acacia mearnsii De Wild., in Southeastern region of the State of Rio Grande do Sul, Brazil. For the adjustment of the height data 19 mathematical equations were tested, being used arithmetic and logarithmic linear equations and one no-linear equation (Chapman-Richards). The following statistical criteria were used in order to select the best equations: a) adjusted determination coefficient (Raj), b) standard error of estimate (Syx), c) variation coefficient in percentage (CV%),d) Furnival index in percentage (IF%) and e) F statistic. The analysis of residues graphic was accomplished for the five better ranked mathematical models. The equation 16, represented by log h = b0 + b1 * 1/d + b2 * 1/I + b3 * 1/D * I resulted as the most efficient model, estimated as function of DBH and age of trees, to adjust the heights in stands with ages of 2, 4, 6 and 8 years old.
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spelling Hypsometrical Relation for Acacia mearnsii with Different AgesRelação Hipsométrica para Acacia mearnsii com Diferentes IdadesHipsometric ralationHeightdiameterBlack wattleRelação hipsométricaAlturaDiâmetroAcácia-negraThis work had as objective to select mathematical models to predict the height of trees in function of DBH and age, in black wattle stands, Acacia mearnsii De Wild., in Southeastern region of the State of Rio Grande do Sul, Brazil. For the adjustment of the height data 19 mathematical equations were tested, being used arithmetic and logarithmic linear equations and one no-linear equation (Chapman-Richards). The following statistical criteria were used in order to select the best equations: a) adjusted determination coefficient (Raj), b) standard error of estimate (Syx), c) variation coefficient in percentage (CV%),d) Furnival index in percentage (IF%) and e) F statistic. The analysis of residues graphic was accomplished for the five better ranked mathematical models. The equation 16, represented by log h = b0 + b1 * 1/d + b2 * 1/I + b3 * 1/D * I resulted as the most efficient model, estimated as function of DBH and age of trees, to adjust the heights in stands with ages of 2, 4, 6 and 8 years old.Este trabalho teve como objetivos selecionar modelos matemáticos para estimar a altura das árvores em função do DAP e idade, em povoamentos de acácia-negra, Acacia meanrsii De Wild., na região Sudeste do Estado do Rio Grande do Sul. Para o ajuste dos dados de altura foram testadas 19 equações matemáticas, sendo utilizadas equações lineares aritméticas e logarítmicas e uma equação não-linear (Chapman-Richards). Como critérios estatísticos de seleção das melhores equações foram utilizados o coeficiente de determinação ajustado (Raj), o erro padrão de estimativa (Syx), o coeficiente de variação em percentagem (CV%), o índice de Furnival em percentagem (IF%) e o valor da estatística F. Em seguida foi realizada a análise gráfica dos resíduos para os cinco melhores modelos matemáticos. A equação 16, representada por log h =b0 + b1 * 1/d + b2 * 1/I + b3 * 1/D * I resultou como modelo mais eficiente,estimado em função do DAP e da idade das árvores, para ajustar as alturas em povoamentos com idades de 2, 4, 6 e 8 anos de idade.Embrapa Florestas2002-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1750Pesquisa Florestal Brasileira; n. 45 (2002): jul./dez.; 57-68Pesquisa Florestal Brasileira; No. 45 (2002): jul./dez.; 57-681983-26051809-3647reponame:Pesquisa Florestal Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1750/681Caldeira, Marcos Vinicius WincklerSchumacher, Mauro ValdirScheeren, Luciano WeberBarichello, Leonir RodriguesWatzlawick, Luciano Farinhainfo:eu-repo/semantics/openAccess2018-11-30T16:01:20Zoai:pfb.cnpf.embrapa.br/pfb:article/1750Revistahttps://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:2018-11-30T16:01:20Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Hypsometrical Relation for Acacia mearnsii with Different Ages
Relação Hipsométrica para Acacia mearnsii com Diferentes Idades
title Hypsometrical Relation for Acacia mearnsii with Different Ages
spellingShingle Hypsometrical Relation for Acacia mearnsii with Different Ages
Caldeira, Marcos Vinicius Winckler
Hipsometric ralation
Height
diameter
Black wattle
Relação hipsométrica
Altura
Diâmetro
Acácia-negra
title_short Hypsometrical Relation for Acacia mearnsii with Different Ages
title_full Hypsometrical Relation for Acacia mearnsii with Different Ages
title_fullStr Hypsometrical Relation for Acacia mearnsii with Different Ages
title_full_unstemmed Hypsometrical Relation for Acacia mearnsii with Different Ages
title_sort Hypsometrical Relation for Acacia mearnsii with Different Ages
author Caldeira, Marcos Vinicius Winckler
author_facet Caldeira, Marcos Vinicius Winckler
Schumacher, Mauro Valdir
Scheeren, Luciano Weber
Barichello, Leonir Rodrigues
Watzlawick, Luciano Farinha
author_role author
author2 Schumacher, Mauro Valdir
Scheeren, Luciano Weber
Barichello, Leonir Rodrigues
Watzlawick, Luciano Farinha
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Caldeira, Marcos Vinicius Winckler
Schumacher, Mauro Valdir
Scheeren, Luciano Weber
Barichello, Leonir Rodrigues
Watzlawick, Luciano Farinha
dc.subject.por.fl_str_mv Hipsometric ralation
Height
diameter
Black wattle
Relação hipsométrica
Altura
Diâmetro
Acácia-negra
topic Hipsometric ralation
Height
diameter
Black wattle
Relação hipsométrica
Altura
Diâmetro
Acácia-negra
description This work had as objective to select mathematical models to predict the height of trees in function of DBH and age, in black wattle stands, Acacia mearnsii De Wild., in Southeastern region of the State of Rio Grande do Sul, Brazil. For the adjustment of the height data 19 mathematical equations were tested, being used arithmetic and logarithmic linear equations and one no-linear equation (Chapman-Richards). The following statistical criteria were used in order to select the best equations: a) adjusted determination coefficient (Raj), b) standard error of estimate (Syx), c) variation coefficient in percentage (CV%),d) Furnival index in percentage (IF%) and e) F statistic. The analysis of residues graphic was accomplished for the five better ranked mathematical models. The equation 16, represented by log h = b0 + b1 * 1/d + b2 * 1/I + b3 * 1/D * I resulted as the most efficient model, estimated as function of DBH and age of trees, to adjust the heights in stands with ages of 2, 4, 6 and 8 years old.
publishDate 2002
dc.date.none.fl_str_mv 2002-12-30
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://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1750
url https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1750
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1750/681
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 Embrapa Florestas
publisher.none.fl_str_mv Embrapa Florestas
dc.source.none.fl_str_mv Pesquisa Florestal Brasileira; n. 45 (2002): jul./dez.; 57-68
Pesquisa Florestal Brasileira; No. 45 (2002): jul./dez.; 57-68
1983-2605
1809-3647
reponame:Pesquisa Florestal Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
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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