Within-Tree Variation of Physical Properties of <italic style="font-style: italic">Acacia melanoxylon</italic> Wood

Fan ZHOU; Zong-ying FU; Xin GAO; Yong-dong ZHOU; Jing-hui JIANG

doi:10.12326/j.2096-9694.2020024

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Within-Tree Variation of Physical Properties of Acacia melanoxylon Wood
1.Research Institute of Wood Industry，Chinese Academy of Forestry，Beijing 100091，China
Vol. 35, Issue 2, Pages: 30-36(2021)
DOI： 10.12326/j.2096-9694.2020024

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周凡,付宗营,高鑫等.黑木相思木材物理性质株内变异研究[J].木材科学与技术,2021,35(02):30-36.

ZHOU Fan,FU Zong-ying,GAO Xin,et al.Within-Tree Variation of Physical Properties of Acacia melanoxylon Wood[J].Chinese Journal of Wood Science and Technology,2021,35(02):30-36.
周凡,付宗营,高鑫等.黑木相思木材物理性质株内变异研究[J].木材科学与技术,2021,35(02):30-36. DOI： 10.12326/j.2096-9694.2020024.

ZHOU Fan,FU Zong-ying,GAO Xin,et al.Within-Tree Variation of Physical Properties of Acacia melanoxylon Wood[J].Chinese Journal of Wood Science and Technology,2021,35(02):30-36. DOI： 10.12326/j.2096-9694.2020024.

摘要

研究我国黑木相思木材主要物理性质的株内变异规律。结果表明：黑木相思木材各项物理性质在树干南北向差异不显著，径向差异均明显大于纵向差异，株内变异主要是径向差异引起。生材含水率自心材区到边材区递减，木材密度的径向变化趋势则基本相反。木材干缩和湿胀率自心材向边材递增；而差异干缩在外部心材处最大。木材吸湿平衡含水率的径向变化趋势与吸湿滞后系数相反。实际生产应考虑黑木相思木材物理性质株内径向差异，制定科学合理干燥工艺。

Abstract

The within-tree variation of wood physical properties was evaluated for ,Acacia melanoxylon, grown in China. The results showed that the differences of various physical properties in north-south direction were not significant. The radial variation was significantly greater than the longitudinal variation, which was the most distinctive in terms of the within-tree variation of various physical properties. The green moisture content of wood decreased gradually from the heartwood part toward the sapwood part, while the radial changing trend of wood density was basically opposite. The shrinkage and swelling values of wood gradually increased from heartwood to sapwood in the radial direction. The ratio of the tangential shrinkage to the radial shrinkage reached the highest level at the heartwood part near the sapwood. The radial variation trend of the sorption hysteresis coefficient was opposite to the hygroscopic equilibrium moisture content variation. These within-tree variation of wood properties need to be considered accordingly and comprehensively, and a scientific drying schedule should be determined when processing,Acacia melanoxylon, wood to improve its utilization.

关键词

黑木相思物理性质径向变异纵向变异

Keywords

Acacia melanoxylonphysical propertyradial variationlongitudinal variation

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Within-Tree Variation of Physical Properties of Acacia melanoxylon Wood

DOI： 10.12326/j.2096-9694.2020024

摘要

Abstract

关键词

Keywords

references