Study on Physica l andMechan ica l Properties of Phoebe bou rneiWoodfrom Planta tion and Na tura l Forest

JIANG Xiang-mei; XIAO Fu-ming; GONG Bin; YE Jin-shan

Based on studying the physical and mechanical p roperties of Phoebe bournei wood from p lantation andnatural forest, the results showed that the air-dry density and oven-dry density of P. bourneiwood from natural forestwere 0. 721 g·cm-3 and 0. 680 g·cm-3 , that from p lantation were 0. 572 g·cm-3 and 0. 535 g·cm-3. Thedifference of wood density between natural forest and p lantation was extremely significant, but the wood densityvariation coefficient of p lantation was less than that of natural forest. The wood volume shrinkage ratio of P. bou rneip lantation and natural forest under air-drying condition were 4. 935% and 6. 439% , while under oven-drycondition, they were 9. 330% and 11. 376% respectively, which meant that the dimensional stability of wood fromP. bournei p lantation was poorer than that from natural forest, but their ratios of tangential to radial direction were1. 75 and 1. 76. The rigidities of P. bournei wood from natural forest in surface, radial and tangential directionswere 7 583 N, 6 183 N and 6 625 N respectively, which was higher than that from p lantation. P. bou rnei naturaland p lantation wood veneer rotary cutting back cracking rate were 53% and 67% and their veneer thicknessdeviation were 0. 09 mm and 0. 08 mm. It was p roved that the p roperties and quality of P. bournei wood fromplantation and natural forest were similar.

1. Jiangxi Academy of Forestry, Key Laboratory of Plant Biotechnology, Jiangxi Province, Nanchang　330032, Jiangxi, China

Received Date: 2006-09-05

Abstract: Based on studying the physical and mechanical p roperties of Phoebe bournei wood from p lantation andnatural forest, the results showed that the air-dry density and oven-dry density of P. bourneiwood from natural forestwere 0. 721 g·cm-3 and 0. 680 g·cm-3 , that from p lantation were 0. 572 g·cm-3 and 0. 535 g·cm-3. Thedifference of wood density between natural forest and p lantation was extremely significant, but the wood densityvariation coefficient of p lantation was less than that of natural forest. The wood volume shrinkage ratio of P. bou rneip lantation and natural forest under air-drying condition were 4. 935% and 6. 439% , while under oven-drycondition, they were 9. 330% and 11. 376% respectively, which meant that the dimensional stability of wood fromP. bournei p lantation was poorer than that from natural forest, but their ratios of tangential to radial direction were1. 75 and 1. 76. The rigidities of P. bournei wood from natural forest in surface, radial and tangential directionswere 7 583 N, 6 183 N and 6 625 N respectively, which was higher than that from p lantation. P. bou rnei naturaland p lantation wood veneer rotary cutting back cracking rate were 53% and 67% and their veneer thicknessdeviation were 0. 09 mm and 0. 08 mm. It was p roved that the p roperties and quality of P. bournei wood fromplantation and natural forest were similar.

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Reference (13)

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Study on Physica l andMechan ica l Properties of Phoebe bou rneiWoodfrom Planta tion and Na tura l Forest

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