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作 者 ：骆秀琴 管宁 张寿槐 陈益泰 支济伟

期 刊 ：林业科学 1997年 33卷 4期 页码：349-355

关键词：木材力学性质；木材密度；株内变异；

Keywords:Mechanical properties, Wood density, Variation within trees,

摘 要 ：对15株浙江产杉木株内不同高度和圆周不同方位上木材的抗弯强度、抗弯弹性模量、顺纹抗压强度和木材密度的差异,木材密度的径向变异模式和木材力学性质与木材密度的相关关系进行了测定和分析。主要结果是:抗弯强度和抗弯弹性模量在株内不同高度上差异特别显著;顺纹抗压强度和木材密度未表现出显著差异;在圆周不同方位上,三项力学性质和木材密度均为南北向高于东西向,差异不显著;木材密度径向变异模式在不同高度和不同方位上均为接近水平有一定波动的直线;三项力学性质与木材密度的相关关系在不同高度和不同方位上均特别显著,但不同力学性质与木材密度的相关系数有明显差异,不同高度上和圆周不同方位上,亦有差异。

Abstract:The differences in wood density，MOR,MOE and crushing strength,the radial variation pattems of wood density and the relationships between mechanical properties and wood density among different heights and four cardinal sides within 15 Chinese-fir trees from Zhejiang province were determined and analysed．There were significant differences in MOR and MOE but no significant ones in wood density and crushing strength among different heights．The mechanical properties and wood density in northern and southem sides were higher than thos in eastem and western sides， however,the differences were insignificant．The density profiles at different heights and in different cardinal sides were horizontal straight lines with fluctuation within 0.1 g/cm³．There were significant correlations between mechanical properties and wood density at different heights and different cardinal sides．The correlation coefficients were greater in southem and eastern sides than in northern and western sides with larger variation in the correlations of MOR and MOE to wood density．

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