CONICITY AND YIELD FOR LUMBER FROM COMMERCIAL SPECIES FROM THE AMAZON

Cerne

Endereço:
Departamento de Ciências Florestais, Universidade Federal de Lavras, Caixa Postal 3037
Lavras / MG
0
Site: http://www.dcf.ufla.br/cerne
Telefone: (35) 3829-1706
ISSN: 1047760
Editor Chefe: Gilvano Ebling Brondani
Início Publicação: 31/05/1994
Periodicidade: Trimestral

CONICITY AND YIELD FOR LUMBER FROM COMMERCIAL SPECIES FROM THE AMAZON

Ano: 2019 | Volume: 25 | Número: 4
Autores: Misael Freitas dos Santos, João Ricardo Vasconcellos Gama, Afonso Figueiredo Filho, Daniele Lima da Costa, Fabiane Aparecida de Souza Retslaff, Renato Bezerra da Silva-Ribeiro, Rafael Rode
Autor Correspondente: Misael Freitas dos Santos | [email protected]

Palavras-chave: Native Amazonian tree species, Stem form, Regional sawmill industry, Sawn patterns

Resumos Cadastrados

Resumo Inglês:

Stem conicity and the sawing pattern, besides the presence of hollows and sapwood, are among the principal factors that are responsible for the low yield of lumber from harvested wood in the Amazon. Therefore, the objective of this study was to analyze of logs and stem conicity, and its effect on yield of sawn wood from the species Handroanthus impetiginosus (Mart. ex DC.) Mattos, Lecythis lurida (Miers) S. A. Mori, Manilkara huberi (Ducke) Chevalier, Astronium lecointei Ducke and Couratari sp., which are currently the most important commercial species in the study area. The data used were obtained from six production units in the Tapajós National Forest, Pará. The variables analyzed were conicity (obtained as a function of the difference between diameters at the base and top) between logs, DBH classes (diameter at breast height) and species, as well as yield (estimated using the Software MaxiTora) between logs and species. The majority of the species showed differences in conicity between logs, with the first log being the most conic, which was directly reflected by the lower yield for this log. There was a tendency of increase in conicity in the larger DBH classes, and differences in conicity and yield between species. The estimated yields were superior to the percent yields observed for Amazonian species in studies done using samples with similar characteristics. Therefore, it was concluded that conicity can vary between species, logs, and DBH classes, and is a characteristic that directly effects the yield of lumber. Furthermore, the incorporation of cutting templates represents an alternative for maximizing lumber yield.