Using the weibull function for prognosis of yield by diameter class in Eucalyptus urophylla stands
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
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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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 |
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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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1807835182821015552 |