GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/8453 |
Resumo: | http://dx.doi.org/10.5902/198050988453For maximum growth and yield of forest quality, scientific studies are needed on management techniques that will result in a higher economic return. A technique widely used in the production forest is thinning, it increases the individual growth of remaining trees. The aim of this study is to develop a system of curved guides to express the potential number of trees per hectare can maintain the forest as a function of dominant height, as an aid in determining the thinnings. The data were provided by the companies Cambará SA, Klabin SA, Forestry SA and United Petropar, where 187 samples were collected, being two dominant trees for unit, adding up to 374 dominant trees. In the selection equation, it was considered the statistical parameters of the adjusted coefficient of determination (R² adj), coefficient of variation (CV), F value and calculated value of chi-square (χ²) and analysis of waste. The equation selected was number 5, however, we observe that equations 5 and 6 are very similar for all the selection criteria used. Comparative analysis of regression equations developed independently for the three sampling regions showed significant differences between them. As there was no interaction between the variable "place" and the ‘hdom’ variable, a regression was calculated for Site 2 and one for Places 1 and 3 because these regressions differed significantly only on the intercept, with parallelism. The residue analysis showed that the equations developed for each site showed no tendency to over-or underestimation, therefore, the use of dominant height as the independent variable is efficient to describe the guidelines for thinning in Pinus taeda L. studied. |
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GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHTDiretrizes para desbaste de Pinus taeda L. em função da altura dominantethinningdominant treesgrowth and productiondesbasteárvores dominantescrescimento e produçãohttp://dx.doi.org/10.5902/198050988453For maximum growth and yield of forest quality, scientific studies are needed on management techniques that will result in a higher economic return. A technique widely used in the production forest is thinning, it increases the individual growth of remaining trees. The aim of this study is to develop a system of curved guides to express the potential number of trees per hectare can maintain the forest as a function of dominant height, as an aid in determining the thinnings. The data were provided by the companies Cambará SA, Klabin SA, Forestry SA and United Petropar, where 187 samples were collected, being two dominant trees for unit, adding up to 374 dominant trees. In the selection equation, it was considered the statistical parameters of the adjusted coefficient of determination (R² adj), coefficient of variation (CV), F value and calculated value of chi-square (χ²) and analysis of waste. The equation selected was number 5, however, we observe that equations 5 and 6 are very similar for all the selection criteria used. Comparative analysis of regression equations developed independently for the three sampling regions showed significant differences between them. As there was no interaction between the variable "place" and the ‘hdom’ variable, a regression was calculated for Site 2 and one for Places 1 and 3 because these regressions differed significantly only on the intercept, with parallelism. The residue analysis showed that the equations developed for each site showed no tendency to over-or underestimation, therefore, the use of dominant height as the independent variable is efficient to describe the guidelines for thinning in Pinus taeda L. studied.http://dx.doi.org/10.5902/198050988453Para um máximo crescimento e produção florestal de qualidade, são necessários estudos científicos sobre técnicas de manejo que venham resultar em um maior retorno econômico. Uma técnica muito utilizada na produção de florestas é o desbaste, pois aumenta o crescimento individual das árvores remanescentes. O objetivo desse estudo é elaborar um sistema de curvas guias para expressar o número potencial de árvores por hectare que a floresta poderá manter em função da altura dominante, como auxiliar na determinação dos desbastes. Os dados foram cedidos pelas empresas Cambará S.A., Klabin S.A., Reflorestadores Unidos S.A. e Petropar, onde foram coletadas 187 amostras, sendo duas árvores dominantes por unidade, totalizando 374 árvores dominantes. Na seleção da equação foram considerados os parâmetros estatísticos do coeficiente de determinação ajustado (R²aj), coeficiente de variação (CV), valor de F calculado, valor do Qui-quadrado (χ²) e a análise dos resíduos. A equação selecionada foi a de número 5, porém, observa-se que as equações 5 e 6 são muito próximas em relação a todos os critérios de seleção utilizados. A análise comparativa das equações de regressão desenvolvidas de forma independente para as três regiões de amostragem apontou haver diferença significativa entre elas. Como não houve interação entre a variável “Local” e a variável hdom, foi calculada uma regressão para o Local 2 e outra para os Locais 1 e 3, pois essas regressões diferiram significativamente apenas quanto ao intercepto, apresentando paralelismo. A análise dos resíduos mostrou que as equações desenvolvidas para cada local não apresentaram tendência de super ou subestimação, portanto, o uso da altura dominante como variável independente é eficiente para descrever as diretrizes para desbaste nos povoamentos de Pinus taeda L. estudados.Universidade Federal de Santa Maria2013-03-27info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/845310.5902/198050988453Ciência Florestal; Vol. 23 No. 1 (2013); 193-201Ciência Florestal; v. 23 n. 1 (2013); 193-2011980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/8453/pdfWeber, Veridiana PadoinFinger, César Augusto GuimarãesFleig, Frederico DimasSouza, Carlos Alberto Martinelli deMunareto, Felipe FortunaSilva, Lorenzo Teixeira de Melo dainfo:eu-repo/semantics/openAccess2017-04-17T18:55:58Zoai:ojs.pkp.sfu.ca:article/8453Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-04-17T18:55:58Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT Diretrizes para desbaste de Pinus taeda L. em função da altura dominante |
title |
GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT |
spellingShingle |
GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT Weber, Veridiana Padoin thinning dominant trees growth and production desbaste árvores dominantes crescimento e produção |
title_short |
GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT |
title_full |
GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT |
title_fullStr |
GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT |
title_full_unstemmed |
GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT |
title_sort |
GUIDELINES FOR THINNING OF Pinus taeda L. BECAUSE OF DOMINANT HEIGHT |
author |
Weber, Veridiana Padoin |
author_facet |
Weber, Veridiana Padoin Finger, César Augusto Guimarães Fleig, Frederico Dimas Souza, Carlos Alberto Martinelli de Munareto, Felipe Fortuna Silva, Lorenzo Teixeira de Melo da |
author_role |
author |
author2 |
Finger, César Augusto Guimarães Fleig, Frederico Dimas Souza, Carlos Alberto Martinelli de Munareto, Felipe Fortuna Silva, Lorenzo Teixeira de Melo da |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Weber, Veridiana Padoin Finger, César Augusto Guimarães Fleig, Frederico Dimas Souza, Carlos Alberto Martinelli de Munareto, Felipe Fortuna Silva, Lorenzo Teixeira de Melo da |
dc.subject.por.fl_str_mv |
thinning dominant trees growth and production desbaste árvores dominantes crescimento e produção |
topic |
thinning dominant trees growth and production desbaste árvores dominantes crescimento e produção |
description |
http://dx.doi.org/10.5902/198050988453For maximum growth and yield of forest quality, scientific studies are needed on management techniques that will result in a higher economic return. A technique widely used in the production forest is thinning, it increases the individual growth of remaining trees. The aim of this study is to develop a system of curved guides to express the potential number of trees per hectare can maintain the forest as a function of dominant height, as an aid in determining the thinnings. The data were provided by the companies Cambará SA, Klabin SA, Forestry SA and United Petropar, where 187 samples were collected, being two dominant trees for unit, adding up to 374 dominant trees. In the selection equation, it was considered the statistical parameters of the adjusted coefficient of determination (R² adj), coefficient of variation (CV), F value and calculated value of chi-square (χ²) and analysis of waste. The equation selected was number 5, however, we observe that equations 5 and 6 are very similar for all the selection criteria used. Comparative analysis of regression equations developed independently for the three sampling regions showed significant differences between them. As there was no interaction between the variable "place" and the ‘hdom’ variable, a regression was calculated for Site 2 and one for Places 1 and 3 because these regressions differed significantly only on the intercept, with parallelism. The residue analysis showed that the equations developed for each site showed no tendency to over-or underestimation, therefore, the use of dominant height as the independent variable is efficient to describe the guidelines for thinning in Pinus taeda L. studied. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-03-27 |
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/8453 10.5902/198050988453 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/8453 |
identifier_str_mv |
10.5902/198050988453 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/8453/pdf |
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 |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 23 No. 1 (2013); 193-201 Ciência Florestal; v. 23 n. 1 (2013); 193-201 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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1799944128558006272 |