Quality in forest cutting operation in stands under two models of mechanized thinning

Detalhes bibliográficos
Autor(a) principal: Nadolny, Alana
Data de Publicação: 2019
Outros Autores: Berude, Leandro Christo, Lopes, Eduardo da Silva, Fiedler, Nilton Cesar, Rodrigues, Carla Krulikowski
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Florestal Brasileira (Online)
Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1689
Resumo: Technological evolution of wood harvesting machines has allowed the expansion of selective thinning areas in forest stands, with gains in productivity, but with risks to affect the work quality. In this context, the aim of this study was to evaluate the quality of harvesting operation in Pinus taeda stands under two thinning models: (1) systematic cutting of the fifth line and selective in adjacent lines, and (2) systematic cutting of the seventh line and selective in adjacent lines. Quality was evaluated by measuring stump height and logs length in assortments saw log, veneer log, and pulpwood. The values were analyzed by means of histograms and the averages were compared by pre-established dimensions through Wilcoxon’s test (α ≤ 0.05). It was verified that 90% of stump heights were above pre-established value, with means of 12.5 and 12.9 cm, resulting in wasted wood volume of 0.50 and 0.62 m3 ha-1 in thinning models 1 and 2, respectively. Length of saw log and veneer log in both thinning models were higher than expected, while values for pulpwood showed significant lower values when compared to the pre-established.
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spelling Quality in forest cutting operation in stands under two models of mechanized thinningQualidade na operação de corte florestal em povoamentos submetidos a dois modelos de desbaste mecanizadoPinus taedaLogMechanical harvestingPinus taedaToraColheita mecanizadaTechnological evolution of wood harvesting machines has allowed the expansion of selective thinning areas in forest stands, with gains in productivity, but with risks to affect the work quality. In this context, the aim of this study was to evaluate the quality of harvesting operation in Pinus taeda stands under two thinning models: (1) systematic cutting of the fifth line and selective in adjacent lines, and (2) systematic cutting of the seventh line and selective in adjacent lines. Quality was evaluated by measuring stump height and logs length in assortments saw log, veneer log, and pulpwood. The values were analyzed by means of histograms and the averages were compared by pre-established dimensions through Wilcoxon’s test (α ≤ 0.05). It was verified that 90% of stump heights were above pre-established value, with means of 12.5 and 12.9 cm, resulting in wasted wood volume of 0.50 and 0.62 m3 ha-1 in thinning models 1 and 2, respectively. Length of saw log and veneer log in both thinning models were higher than expected, while values for pulpwood showed significant lower values when compared to the pre-established.A evolução tecnológica das máquinas de colheita de madeira tem permitido a ampliação da área de desbaste seletivo nos povoamentos florestais, com ganhos de produtividade, porém com riscos de afetar a qualidade do trabalho. Neste contexto, objetivou-se avaliar a qualidade da operação de colheita florestal com harvester em povoamentos de Pinus taeda submetidos a dois modelos de desbaste: (1) corte sistemático da quinta linha e seletivo nas linhas adjacentes e (2) corte sistemático da sétima linha e seletivo nas adjacentes. A qualidade foi avaliada pela mensuração da altura das cepas e comprimento das toras nos sortimentos serraria, laminação e celulose. Os valores obtidos foram analisados por meio de histogramas e as médias comparadas com as dimensões pré-estabelecidas por meio do teste Wilcoxon (α ≤ 0,05). As alturas de 90% das cepas superaram o valor pré-estabelecido, com médias de 12,5 e 12,9 cm, acarretando em volume de madeira desperdiçado de 0,50 e 0,62 m3 ha-1 nos modelos de desbaste 1 e 2, respectivamente. Os comprimentos das toras de serraria e laminação, nos dois modelos de desbaste, foram superiores ao esperado, enquanto os valores para toras para celulose mostraram-se inferiores estatisticamente em relação ao pré-estabelecido.Embrapa Florestas2019-05-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/168910.4336/2019.pfb.39e201801689Pesquisa Florestal Brasileira; v. 39 (2019)Pesquisa Florestal Brasileira; Vol. 39 (2019)1983-26051809-3647reponame:Pesquisa Florestal Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1689/832https://creativecommons.org/licenses/by-nc-nd/4.0info:eu-repo/semantics/openAccessNadolny, AlanaBerude, Leandro ChristoLopes, Eduardo da SilvaFiedler, Nilton CesarRodrigues, Carla Krulikowski2019-12-31T20:35:27Zoai:pfb.cnpf.embrapa.br/pfb:article/1689Revistahttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/PUBhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/oaipfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br1983-26051809-3647opendoar:2019-12-31T20:35:27Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Quality in forest cutting operation in stands under two models of mechanized thinning
Qualidade na operação de corte florestal em povoamentos submetidos a dois modelos de desbaste mecanizado
title Quality in forest cutting operation in stands under two models of mechanized thinning
spellingShingle Quality in forest cutting operation in stands under two models of mechanized thinning
Nadolny, Alana
Pinus taeda
Log
Mechanical harvesting
Pinus taeda
Tora
Colheita mecanizada
title_short Quality in forest cutting operation in stands under two models of mechanized thinning
title_full Quality in forest cutting operation in stands under two models of mechanized thinning
title_fullStr Quality in forest cutting operation in stands under two models of mechanized thinning
title_full_unstemmed Quality in forest cutting operation in stands under two models of mechanized thinning
title_sort Quality in forest cutting operation in stands under two models of mechanized thinning
author Nadolny, Alana
author_facet Nadolny, Alana
Berude, Leandro Christo
Lopes, Eduardo da Silva
Fiedler, Nilton Cesar
Rodrigues, Carla Krulikowski
author_role author
author2 Berude, Leandro Christo
Lopes, Eduardo da Silva
Fiedler, Nilton Cesar
Rodrigues, Carla Krulikowski
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Nadolny, Alana
Berude, Leandro Christo
Lopes, Eduardo da Silva
Fiedler, Nilton Cesar
Rodrigues, Carla Krulikowski
dc.subject.por.fl_str_mv Pinus taeda
Log
Mechanical harvesting
Pinus taeda
Tora
Colheita mecanizada
topic Pinus taeda
Log
Mechanical harvesting
Pinus taeda
Tora
Colheita mecanizada
description Technological evolution of wood harvesting machines has allowed the expansion of selective thinning areas in forest stands, with gains in productivity, but with risks to affect the work quality. In this context, the aim of this study was to evaluate the quality of harvesting operation in Pinus taeda stands under two thinning models: (1) systematic cutting of the fifth line and selective in adjacent lines, and (2) systematic cutting of the seventh line and selective in adjacent lines. Quality was evaluated by measuring stump height and logs length in assortments saw log, veneer log, and pulpwood. The values were analyzed by means of histograms and the averages were compared by pre-established dimensions through Wilcoxon’s test (α ≤ 0.05). It was verified that 90% of stump heights were above pre-established value, with means of 12.5 and 12.9 cm, resulting in wasted wood volume of 0.50 and 0.62 m3 ha-1 in thinning models 1 and 2, respectively. Length of saw log and veneer log in both thinning models were higher than expected, while values for pulpwood showed significant lower values when compared to the pre-established.
publishDate 2019
dc.date.none.fl_str_mv 2019-05-10
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://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1689
10.4336/2019.pfb.39e201801689
url https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1689
identifier_str_mv 10.4336/2019.pfb.39e201801689
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1689/832
dc.rights.driver.fl_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Embrapa Florestas
publisher.none.fl_str_mv Embrapa Florestas
dc.source.none.fl_str_mv Pesquisa Florestal Brasileira; v. 39 (2019)
Pesquisa Florestal Brasileira; Vol. 39 (2019)
1983-2605
1809-3647
reponame:Pesquisa Florestal Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Florestal Brasileira (Online)
collection Pesquisa Florestal Brasileira (Online)
repository.name.fl_str_mv Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br
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