三种速生杨木材物理力学性质的比较研究

测试、分析比较了不同树龄3种速生杨木材的物理力学性质,结果表明:①树种对物理力学性能有较大的影响,三倍体圆叶毛白杨的物理力学性能最好,三倍体裂叶毛白杨次之,中林-46最差;方差分析表明,3种杨树的主要物理力学性质均达到显著和极显著差异。②树龄对物理力学性质的影响不大,随着树龄的增长,不同杨树木材的密度已趋于稳定,但力学性能有上升的趋势;方差分析表明,抗截切强度和抗弯强度受树龄影响较大,差异达到显著水平,其他性质无显著差异。

A comoparative study on the physical and mechanical properties among three species of fast-growing poplar

In this study,three kinds of fast growing Poplar,round leaf variety of triploid Populus tomentosa Carr.,decomposite leaf variety of triploid Populus tomentosa Carr.and Zhonglin-46,with three different ages were selected as the materials.The results showed that: ①The physical and mechanical properties of round leaf variety of triploid P.tomentosa was best,decomposite leaf variety of triploid P.tomentosa was similar to round leaf variety of triploid P.tomentosa and zhonglin-46 was worst.It indicated that there were significant differences for main physical and mechanical properties of three kinds of poplar by variance analysis.②There were no significant differences of physical and mechanical properties among the different ages,the density of different tree tended to stability and the mechanical strength increased slowly with the increase of tree ages.It indicated that there were significant differences for the bending strength and shearing strength affected by the ages and no significant differences for others by variance analysis.