Lumber quality of Eucalyptus grandis as a function of diametrical position and log steaming

Autor(es)

Durgante Severo, Elias Taylor ^[1] ; Calonego, Fred Willians ^[1] ; Oliveira de Matos, Carlos Alberto ^[2]

Afiliação do(s) autor(es)

^[1] UNESP, Dept Nat Resource Forest Sci, Botucatu, SP - Brazil

^[2] UNESP, Itapeva, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 101, n. 7, p. 2545-2548, APR 2010.
• Citações Web of Science: 11

Resumo

The objective of this study was to evaluate the effect of log steaming and of the diametrical position of boards on the timber quality of Eucalyptus grandis. Logs with diameters between 20 and 25 cm, between 25 and 30 cm and between 30 and 35 cm were studied. Half of logs were kept in its original condition, and the other half was steamed at 90 degrees C for 20 h. Later, the logs were cut into flat saw boards, and defects due to growth stress relief were measured. The results show that: (1) boards from control logs show different magnitudes of cracking according to the diameter of the log and the diametrical position of the board: (2) boards from logs with diameters between 30 and 35 cm and those from next to the pith develop larger cracks; and (3) boards from steamed logs show a reduction in the magnitude of cracking and a homogenous distribution of this defect relative to diametrical position within the log. (C) 2009 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 02/05028-6 - Vaporização de toras visando à qualidade de desdobro e secagem da madeira serrada de Eucalyptus grandis
• Beneficiário: Fred Willians Calonego
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 00/02165-7 - Efeito da vaporização preliminar e secagem no teor de umidade inicial gradiente de umidade e taxa de secagem em madeira serrada de Eucalyptus
• Beneficiário: Elias Taylor Durgante Severo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores