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对11年生的11个美洲黑杨新无性系和1个对照组NL-351杨木材的气干密度、基本密度、干缩性、顺纹抗压强度、抗弯强度、抗弯弹性模量以及冲击韧性等物理力学性能进行了比较研究。结果表明,美洲黑杨新无性系木材的物理力学性能在无性系间存在显著差异;11个无性系中,无性系4-45、7-40和10-34的材性表现最好;密度与力学性能之间存在正相关关系;除了冲击韧性外,其他性能之间都存在显著或极显著的线性相关。
The air-dry density, basic density, shrinkage, compressive strength, flexural strength, flexural modulus and elastic modulus of 11-year-old Populus new clones and a control NL-351 poplar wood were Impact toughness and other physical and mechanical properties were compared. The results showed that the physical and mechanical properties of the clones of Populus nigra were significantly different among the clones. Among the 11 clones, the clones 4-45, 7-40 and 10-34 had the best material properties. There is a positive correlation between mechanical properties; except for impact toughness, there are significant or highly significant linear correlations among other properties.