Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands

Detalhes bibliográficos
Autor(a) principal: Miguel, Eder Pereira
Data de Publicação: 2015
Outros Autores: Machado, Sebastião do Amaral, Filho, Afonso Figueiredo, Arce, Julio Eduardo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://www.cerne.ufla.br/site/index.php/CERNE/article/view/170
http://repositorio.ufla.br/jspui/handle/1/14522
Resumo: This study aimed to fit the Weibull probability density function to stand data so as to represent the distribution of number of trees by diameter class, and also to fit models representing stand attributes so as to project growth and yield by diameter class and also yield of multiple wood products at the relevant rotation age (7 years). Data were collected from Eucalyptus urophylla stands owned by Anglo Americana plc (CODEMIM), a company situated in the municipality of Niquelândia, Goiás state. Initially a 3P-Weibull probability function was fitted by the percentile method for the aggregate stand. Then models were fitted and selected of stand attributes using residuals plot, residual standard error (syx) and coefficient of determination (R²) as selection criteria. The hypsometric model of Trorey was then used to derive the average height of possible diameter classes, and the taper model of degree 5 and volumetric model of Takata were used to check compatibility of generated volumes. Prognosticated results were consistent with local productivity when compared to previous inventories complied by the same company of stands within the same age group.
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spelling Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla standsUtilização da função weibull para prognose da produção por classe diamétrica para povoamentos de Eucalyptus urophyllaModelingImplicit modelsStand attributesModelagemAtributos do povoamentoModelos implícitosThis study aimed to fit the Weibull probability density function to stand data so as to represent the distribution of number of trees by diameter class, and also to fit models representing stand attributes so as to project growth and yield by diameter class and also yield of multiple wood products at the relevant rotation age (7 years). Data were collected from Eucalyptus urophylla stands owned by Anglo Americana plc (CODEMIM), a company situated in the municipality of Niquelândia, Goiás state. Initially a 3P-Weibull probability function was fitted by the percentile method for the aggregate stand. Then models were fitted and selected of stand attributes using residuals plot, residual standard error (syx) and coefficient of determination (R²) as selection criteria. The hypsometric model of Trorey was then used to derive the average height of possible diameter classes, and the taper model of degree 5 and volumetric model of Takata were used to check compatibility of generated volumes. Prognosticated results were consistent with local productivity when compared to previous inventories complied by the same company of stands within the same age group.Nesta pesquisa, objetivou-se ajustar a função de densidade de probabilidade Weibull aos dados do povoamento, visando a representar a distribuição do número de árvores por classes de diâmetro bem como ajustar modelos que representem seus atributos para projetar o crescimento e a produção por classe diamétrica e o rendimento dos múltiplos produtos da madeira na idade da rotação adotada pela empresa (sete anos). Os dados provieram de povoamentos de Eucalyptus urophylla da empresa Anglo Americana plc (CODEMIM), localizada no município de Niquelândia no estado de Goiás. Inicialmente foi ajustada a função de probabilidade Weibull três parâmetros pelo método dos percentis, para o povoamento como um todo. Posteriormente, foram ajustados e selecionados modelos dos atributos do povoamento, utilizando-se como critérios de seleção o Gráfico de resíduos, Erro Padrão Residual (syx ) e o Coeficiente de Determinação (R²). Em seguida, foi utilizado o modelo hipsométrico de Trorey para obtenção da altura média das possíveis classes diamétricas e utilizado o modelo de afilamento de 5° grau e o modelo volumétrico de Takata, visando à compatibilidade dos volumes por eles gerados. Os resultados prognosticados foram coerentes com a produção do local, quando comparados com inventários já realizados na empresa em povoamento com essa faixa de idade.CERNE2015-05-152017-08-01T20:15:10Z2017-08-01T20:15:10Z2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/170MIGUEL, E. P. et al. Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands. Cerne, Lavras, v. 16, n. 1, p. 94-104, jan./mar. 2010.http://repositorio.ufla.br/jspui/handle/1/14522CERNE; Vol 16 No 1 (2010); 094-104CERNE; Vol 16 No 1 (2010); 094-1042317-63420104-7760reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAporhttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/170/143Copyright (c) 2015 Eder Pereira Miguel, Sebastião do Amaral Machado, Afonso Figueiredo Filho, Julio Eduardo ArceAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessMiguel, Eder PereiraMachado, Sebastião do AmaralFilho, Afonso FigueiredoArce, Julio Eduardo2021-04-19T17:39:23Zoai:localhost:1/14522Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-04-19T17:39:23Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
Utilização da função weibull para prognose da produção por classe diamétrica para povoamentos de Eucalyptus urophylla
title Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
spellingShingle Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
Miguel, Eder Pereira
Modeling
Implicit models
Stand attributes
Modelagem
Atributos do povoamento
Modelos implícitos
title_short Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
title_full Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
title_fullStr Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
title_full_unstemmed Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
title_sort Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
author Miguel, Eder Pereira
author_facet Miguel, Eder Pereira
Machado, Sebastião do Amaral
Filho, Afonso Figueiredo
Arce, Julio Eduardo
author_role author
author2 Machado, Sebastião do Amaral
Filho, Afonso Figueiredo
Arce, Julio Eduardo
author2_role author
author
author
dc.contributor.author.fl_str_mv Miguel, Eder Pereira
Machado, Sebastião do Amaral
Filho, Afonso Figueiredo
Arce, Julio Eduardo
dc.subject.por.fl_str_mv Modeling
Implicit models
Stand attributes
Modelagem
Atributos do povoamento
Modelos implícitos
topic Modeling
Implicit models
Stand attributes
Modelagem
Atributos do povoamento
Modelos implícitos
description This study aimed to fit the Weibull probability density function to stand data so as to represent the distribution of number of trees by diameter class, and also to fit models representing stand attributes so as to project growth and yield by diameter class and also yield of multiple wood products at the relevant rotation age (7 years). Data were collected from Eucalyptus urophylla stands owned by Anglo Americana plc (CODEMIM), a company situated in the municipality of Niquelândia, Goiás state. Initially a 3P-Weibull probability function was fitted by the percentile method for the aggregate stand. Then models were fitted and selected of stand attributes using residuals plot, residual standard error (syx) and coefficient of determination (R²) as selection criteria. The hypsometric model of Trorey was then used to derive the average height of possible diameter classes, and the taper model of degree 5 and volumetric model of Takata were used to check compatibility of generated volumes. Prognosticated results were consistent with local productivity when compared to previous inventories complied by the same company of stands within the same age group.
publishDate 2015
dc.date.none.fl_str_mv 2015-05-15
2017-08-01T20:15:10Z
2017-08-01T20:15:10Z
2017-08-01
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 http://www.cerne.ufla.br/site/index.php/CERNE/article/view/170
MIGUEL, E. P. et al. Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands. Cerne, Lavras, v. 16, n. 1, p. 94-104, jan./mar. 2010.
http://repositorio.ufla.br/jspui/handle/1/14522
url http://www.cerne.ufla.br/site/index.php/CERNE/article/view/170
http://repositorio.ufla.br/jspui/handle/1/14522
identifier_str_mv MIGUEL, E. P. et al. Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands. Cerne, Lavras, v. 16, n. 1, p. 94-104, jan./mar. 2010.
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.cerne.ufla.br/site/index.php/CERNE/article/view/170/143
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv CERNE
publisher.none.fl_str_mv CERNE
dc.source.none.fl_str_mv CERNE; Vol 16 No 1 (2010); 094-104
CERNE; Vol 16 No 1 (2010); 094-104
2317-6342
0104-7760
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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