美洲黑杨新无性系主要物理力学性能研究

Physical and mechanical properties of new Populus deltoides clones

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 physical and mechanical properties of 11 new Populus deltoides clones species at 1 lyears old were studied. The 11-year-old clone NL-351 was the control. The result showed there were significant differences in the physical and mechanical properties among the 11 clones were observed. Clone 4-45, 7-40, and 10-34 showed the better physical and mechanical properties than other eight clones. A positive correlation between den- sity and mechanical properties was determined. Except the toughness, other five properties were significantly lin- ear correlated.