TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia

Detalhes bibliográficos
Autor(a) principal: Costa, Emanuel Arnoni
Data de Publicação: 2016
Outros Autores: Finger, César Augusto Guimarães, Schneider, Paulo Renato, Hess, André Felipe
Tipo de documento: Artigo
Idioma: por
Título da fonte: Ciência Florestal (Online)
Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/22753
Resumo: Taper functions allow determining size classes and volumes of trees with direct application in the planning of technical and economic forest activities. For this purpose, the aim of this study was to describe the taper of the trunk of Araucaria angustifolia (Bertol.) Kuntze in the portion between the ground level and the insertion of the crown of individuals in remnant of native forest. Also tried to fit the regression model to represent relations height/DBH, diameter at the insertion of the crown in function DBH and the development of assortment timber table. Eighty-five trees were measured their diameters and heights relatives using Hohenadl cubed method and the diameter of the insertion crown with Criterion RD 1000 instrument. The taper models were adjusted by regression analysis using polynomial of the 5th degree, Kozak (1988), Lee et al. (2003) and Sharma and Zhang (2004). The adjusted coefficient of determination (R²aj), the standard error of estimate in percentage (Syx%) and graphical analysis between estimated values in function of observed were used statistics to evaluate the quality of fit and models precision. The model height/DBH and diameter at the insertion point of the crown evidence good fit statistical and precision, allowing its application in activities intended at planning and forest inventories. The flexibility and efficiency of Kozak (1988) model in predicting diameters and volumes until the crown insertion point favors the use and obtain timber assortments of araucaria.
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spelling TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifoliaFUNÇÃO DE AFILAMENTO E SORTIMENTOS DE MADEIRA PARA Araucaria angustifoliaParana pinetrunk profileindividual volumetimber assortments.pinheiro-brasileiroperfil do fustevolume individualsortimentos de madeira.Taper functions allow determining size classes and volumes of trees with direct application in the planning of technical and economic forest activities. For this purpose, the aim of this study was to describe the taper of the trunk of Araucaria angustifolia (Bertol.) Kuntze in the portion between the ground level and the insertion of the crown of individuals in remnant of native forest. Also tried to fit the regression model to represent relations height/DBH, diameter at the insertion of the crown in function DBH and the development of assortment timber table. Eighty-five trees were measured their diameters and heights relatives using Hohenadl cubed method and the diameter of the insertion crown with Criterion RD 1000 instrument. The taper models were adjusted by regression analysis using polynomial of the 5th degree, Kozak (1988), Lee et al. (2003) and Sharma and Zhang (2004). The adjusted coefficient of determination (R²aj), the standard error of estimate in percentage (Syx%) and graphical analysis between estimated values in function of observed were used statistics to evaluate the quality of fit and models precision. The model height/DBH and diameter at the insertion point of the crown evidence good fit statistical and precision, allowing its application in activities intended at planning and forest inventories. The flexibility and efficiency of Kozak (1988) model in predicting diameters and volumes until the crown insertion point favors the use and obtain timber assortments of araucaria.Funções de afilamento permitem determinar classes de dimensão e volumes das árvores com aplicação direta no planejamento das atividades técnicas e econômicas da floresta. Com esse propósito, os objetivos do presente estudo foram descrever o afilamento do fuste de Araucaria angustifolia (Bertol.) Kuntze na porção compreendida entre o nível do solo e a inserção da copa de árvores de remanescente florestal nativo, bem como ajustar modelo de regressão para a relação altura/DAP, para o diâmetro na inserção da copa sobre o DAP e demonstrar a aplicação das funções com a confecção de uma tabela de sortimentos de madeira.  Oitenta e cinco árvores tiveram medidas seus diâmetros e alturas relativas pelo método de cubagem rigorosa de Hohenadl, assim como o diâmetro na inserção da copa com o Criterion RD 1000. Os modelos de afilamento ajustados por regressão foram o polinômio do 5º grau, Kozak (1988), Lee et al. (2003) e Sharma e Zhang (2004). O coeficiente de determinação ajustado (R²aj), o erro padrão da estimativa em porcentagem (Syx%) e a análise gráfica entre valores estimados e observados foram as estatísticas usadas para avaliar o ajuste e a precisão dos modelos. O modelo da relação altura/DAP e do diâmetro no ponto de inserção da copa alcançaram boas estatísticas de ajuste e precisão, permitindo sua aplicação em inventários florestais e no planejamento da produção florestal. A flexibilidade e a eficiência do modelo de Kozak (1988) em predizer diâmetros e volumes até o ponto de inserção da copa favorecem o uso e obtenção de sortimentos de madeira de araucária.Universidade Federal de Santa Maria2016-06-20info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/2275310.5902/1980509822753Ciência Florestal; Vol. 26 No. 2 (2016); 523-533Ciência Florestal; v. 26 n. 2 (2016); 523-5331980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/22753/13435Copyright (c) 2016 Ciência Florestalinfo:eu-repo/semantics/openAccessCosta, Emanuel ArnoniFinger, César Augusto GuimarãesSchneider, Paulo RenatoHess, André Felipe2017-04-06T17:48:22Zoai:ojs.pkp.sfu.ca:article/22753Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-04-06T17:48:22Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia
FUNÇÃO DE AFILAMENTO E SORTIMENTOS DE MADEIRA PARA Araucaria angustifolia
title TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia
spellingShingle TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia
Costa, Emanuel Arnoni
Parana pine
trunk profile
individual volume
timber assortments.
pinheiro-brasileiro
perfil do fuste
volume individual
sortimentos de madeira.
title_short TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia
title_full TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia
title_fullStr TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia
title_full_unstemmed TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia
title_sort TAPER FUNCTION AND TIMBER ASSORTMENTS FOR Araucaria angustifolia
author Costa, Emanuel Arnoni
author_facet Costa, Emanuel Arnoni
Finger, César Augusto Guimarães
Schneider, Paulo Renato
Hess, André Felipe
author_role author
author2 Finger, César Augusto Guimarães
Schneider, Paulo Renato
Hess, André Felipe
author2_role author
author
author
dc.contributor.author.fl_str_mv Costa, Emanuel Arnoni
Finger, César Augusto Guimarães
Schneider, Paulo Renato
Hess, André Felipe
dc.subject.por.fl_str_mv Parana pine
trunk profile
individual volume
timber assortments.
pinheiro-brasileiro
perfil do fuste
volume individual
sortimentos de madeira.
topic Parana pine
trunk profile
individual volume
timber assortments.
pinheiro-brasileiro
perfil do fuste
volume individual
sortimentos de madeira.
description Taper functions allow determining size classes and volumes of trees with direct application in the planning of technical and economic forest activities. For this purpose, the aim of this study was to describe the taper of the trunk of Araucaria angustifolia (Bertol.) Kuntze in the portion between the ground level and the insertion of the crown of individuals in remnant of native forest. Also tried to fit the regression model to represent relations height/DBH, diameter at the insertion of the crown in function DBH and the development of assortment timber table. Eighty-five trees were measured their diameters and heights relatives using Hohenadl cubed method and the diameter of the insertion crown with Criterion RD 1000 instrument. The taper models were adjusted by regression analysis using polynomial of the 5th degree, Kozak (1988), Lee et al. (2003) and Sharma and Zhang (2004). The adjusted coefficient of determination (R²aj), the standard error of estimate in percentage (Syx%) and graphical analysis between estimated values in function of observed were used statistics to evaluate the quality of fit and models precision. The model height/DBH and diameter at the insertion point of the crown evidence good fit statistical and precision, allowing its application in activities intended at planning and forest inventories. The flexibility and efficiency of Kozak (1988) model in predicting diameters and volumes until the crown insertion point favors the use and obtain timber assortments of araucaria.
publishDate 2016
dc.date.none.fl_str_mv 2016-06-20
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/22753
10.5902/1980509822753
url https://periodicos.ufsm.br/cienciaflorestal/article/view/22753
identifier_str_mv 10.5902/1980509822753
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/22753/13435
dc.rights.driver.fl_str_mv Copyright (c) 2016 Ciência Florestal
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2016 Ciência Florestal
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. 26 No. 2 (2016); 523-533
Ciência Florestal; v. 26 n. 2 (2016); 523-533
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
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