Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests

Detalhes bibliográficos
Autor(a) principal: Beltran, Hernan Attis
Data de Publicação: 2016
Outros Autores: Chauchard, Luis, Velásquez, Abel, Sbrancia, Renato, Pastur, Guillermo Martínez
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://www.cerne.ufla.br/site/index.php/CERNE/article/view/1324
http://repositorio.ufla.br/jspui/handle/1/14469
Resumo: The first step for constructing models of tree growth and yield is site quality assessment. To estimate this attribute, several methodologies are available in which site index (SI) is a standard one. However, this approach, that uses height at a reference age of trees, can be simplified if age is replaced by another reference variable easier to measure. In this case, the diametric site index (DSI) represents the mean height of dominant trees at a reference mean diameter at breast height. The aim of this work was to develop DSI in pure and mixed Nothofagus alpina and N. obliqua forests, and compare these models with the classical proposals based on height-age variables, within the temperate forest of northwestern Patagonia from Argentina, South America. Data originated from temporary plots and stem analyses were used. Tree age and diameter at breast height were obtained from each plot and used for establishing DSI family functions, following the guide-curve methodology. Site classes were proportionally represented among DSI curves of 17.0, 21.5, 26.0, 30.5 and 35.0 m of dominant tree height. Reference diameter instead of reference age can be cautiously used in order to fit site index models.
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spelling Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forestsÍndice de sítio diamétrico: um método alternativo para estimar a qualidade do sítio em florestas de Nothofagus obliqua e N. alpinaGrowth and yieldAverage reference DBHGuide curve methodologyCrescimento e produçãoDAP médio de referênciaMetodologia da curva guiaThe first step for constructing models of tree growth and yield is site quality assessment. To estimate this attribute, several methodologies are available in which site index (SI) is a standard one. However, this approach, that uses height at a reference age of trees, can be simplified if age is replaced by another reference variable easier to measure. In this case, the diametric site index (DSI) represents the mean height of dominant trees at a reference mean diameter at breast height. The aim of this work was to develop DSI in pure and mixed Nothofagus alpina and N. obliqua forests, and compare these models with the classical proposals based on height-age variables, within the temperate forest of northwestern Patagonia from Argentina, South America. Data originated from temporary plots and stem analyses were used. Tree age and diameter at breast height were obtained from each plot and used for establishing DSI family functions, following the guide-curve methodology. Site classes were proportionally represented among DSI curves of 17.0, 21.5, 26.0, 30.5 and 35.0 m of dominant tree height. Reference diameter instead of reference age can be cautiously used in order to fit site index models.primeiro passo para a construção de modelos de crescimento e produção de árvores e a avaliação da qualidade do sítio. Para estimar este atributo, várias metodologias estão disponíveis, na qual o índice de sítio (IS) é padrão. No entanto, esta abordagem, que utiliza uma altura na idade de referência, pode ser simplificada se a idade é substituída por outra variável de referência mais fácil de medir. Neste caso, o índice de índice de sítio diamétrico (ISD) representa a altura média das árvores dominantes de um diâmetro à altura do peito referência. O objetivo deste trabalho foi desenvolver ISD para florestas puras e mistas de Nothofagus alpina e N. obliqua, e comparar esses modelos com as propostas clássicas baseadas nas variáveis altura-idade, para a floresta temperada do noroeste da Patagônia da Argentina, América do Sul. Dados provenientes de parcelas temporárias e análises de tronco foram utilizados. Foram obtidos idade e diâmetro à altura do peito de cada parcela e utilizados para o estabelecimento das funções da família DSI, seguindo a metodologia da curva-guia. Classes de sítio foram proporcionalmente representados entre curvas DSI de 17,0; 21,5; 26,0; 30,5 e 35,0 m de altura da árvore dominante. O diâmetro de referência em vez da idade de referência pode ser usado com cautela para ajustar modelos de índice de sítio.CERNE2016-10-082017-08-01T20:14:44Z2017-08-01T20:14:44Z2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/1324BELTRAN, H. A. et al. Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua e N. alpina forests. Cerne, Lavras, v. 22, n. 3, p. 345-354, 2016.http://repositorio.ufla.br/jspui/handle/1/14469CERNE; Vol 22 No 3 (2016); 345-354CERNE; Vol 22 No 3 (2016); 345-3542317-63420104-7760reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/1324/938Copyright (c) 2016 CERNEhttp://creativecommons.org/licenses/by/4.0/Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccessBeltran, Hernan AttisChauchard, LuisVelásquez, AbelSbrancia, RenatoPastur, Guillermo Martínez2021-04-27T19:27:12Zoai:localhost:1/14469Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-04-27T19:27:12Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests
Índice de sítio diamétrico: um método alternativo para estimar a qualidade do sítio em florestas de Nothofagus obliqua e N. alpina
title Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests
spellingShingle Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests
Beltran, Hernan Attis
Growth and yield
Average reference DBH
Guide curve methodology
Crescimento e produção
DAP médio de referência
Metodologia da curva guia
title_short Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests
title_full Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests
title_fullStr Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests
title_full_unstemmed Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests
title_sort Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua and N. alpina forests
author Beltran, Hernan Attis
author_facet Beltran, Hernan Attis
Chauchard, Luis
Velásquez, Abel
Sbrancia, Renato
Pastur, Guillermo Martínez
author_role author
author2 Chauchard, Luis
Velásquez, Abel
Sbrancia, Renato
Pastur, Guillermo Martínez
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Beltran, Hernan Attis
Chauchard, Luis
Velásquez, Abel
Sbrancia, Renato
Pastur, Guillermo Martínez
dc.subject.por.fl_str_mv Growth and yield
Average reference DBH
Guide curve methodology
Crescimento e produção
DAP médio de referência
Metodologia da curva guia
topic Growth and yield
Average reference DBH
Guide curve methodology
Crescimento e produção
DAP médio de referência
Metodologia da curva guia
description The first step for constructing models of tree growth and yield is site quality assessment. To estimate this attribute, several methodologies are available in which site index (SI) is a standard one. However, this approach, that uses height at a reference age of trees, can be simplified if age is replaced by another reference variable easier to measure. In this case, the diametric site index (DSI) represents the mean height of dominant trees at a reference mean diameter at breast height. The aim of this work was to develop DSI in pure and mixed Nothofagus alpina and N. obliqua forests, and compare these models with the classical proposals based on height-age variables, within the temperate forest of northwestern Patagonia from Argentina, South America. Data originated from temporary plots and stem analyses were used. Tree age and diameter at breast height were obtained from each plot and used for establishing DSI family functions, following the guide-curve methodology. Site classes were proportionally represented among DSI curves of 17.0, 21.5, 26.0, 30.5 and 35.0 m of dominant tree height. Reference diameter instead of reference age can be cautiously used in order to fit site index models.
publishDate 2016
dc.date.none.fl_str_mv 2016-10-08
2017-08-01T20:14:44Z
2017-08-01T20:14:44Z
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/1324
BELTRAN, H. A. et al. Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua e N. alpina forests. Cerne, Lavras, v. 22, n. 3, p. 345-354, 2016.
http://repositorio.ufla.br/jspui/handle/1/14469
url http://www.cerne.ufla.br/site/index.php/CERNE/article/view/1324
http://repositorio.ufla.br/jspui/handle/1/14469
identifier_str_mv BELTRAN, H. A. et al. Diametric site index: an alternative method to estimate site quality in Nothofagus obliqua e N. alpina forests. Cerne, Lavras, v. 22, n. 3, p. 345-354, 2016.
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://www.cerne.ufla.br/site/index.php/CERNE/article/view/1324/938
dc.rights.driver.fl_str_mv Copyright (c) 2016 CERNE
http://creativecommons.org/licenses/by/4.0/
Attribution 4.0 International
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2016 CERNE
http://creativecommons.org/licenses/by/4.0/
Attribution 4.0 International
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 22 No 3 (2016); 345-354
CERNE; Vol 22 No 3 (2016); 345-354
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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