人工杉木林木材力学性质变异规律的研究

本文应用正交试验设计方法，系统分析了不同林龄、立地条件和林分密度下人工杉木林木材力学性质的变化规律，结果表明：影响人工杉木林木材力学性质的主导因子是林龄，其次是立地条件，林分密度影响最小，其12年生木材基本上达到建筑材承重构件的最低等级要求．研究结果为人工杉木林的定向培育和合理利用提供科学的理论依据．

Study on the Law of Variation in Mechanic Properties of Chinese Fir Wood from Plantation

By using orthogonal design, this paper systematically analysed the law of variation in mechanicproperties of Chinese fir wood from plantations, which with different ages and densities, and grown in different sites. The results showed that the degree to which each factor affects the mechanic properties of Chinesefir wood were determinated as: the first is age, the second is site, and the third is density; The woods with12 ages could meet on the whole the least demand of architectural pressure. The conclusions provided a scientific basis for directive culture and rational utilization for Chinese fir.