栽植密度对小黑杨树木生长因子和木材物理力学性质的影响  

Effects on growth factors and wood physical and mechanical properties of Populus×xiaohei in different planting densities

作　　者：刘杏娥[1] 汪佑宏[2] 徐斌[2] 张群[3] 

机构地区：[1]国际竹藤网络中心,北京100102 [2]安徽农业大学林学与园林学院,合肥230036 [3]中国林业科学研究院林业研究所,北京100091

出　　处：《安徽农业大学学报》2007年第2期226-231,共6页Journal of Anhui Agricultural University

基　　金：国家自然科学基金重点项目(30230420)资助

摘　　要：以山西朔州小黑杨(Populus×xiaoheiT.S.Hvang et Liang)人工林为试验材料,研究了3种栽植密度(1000、500、250株.hm-2)对小黑杨树木生长、木材生长量和主要物理力学性质的影响。结果表明,栽植密度对树木冠幅、冠长、胸径、湿心材面积、边材面积和木材基本密度、顺纹抗压强度和MOE的影响达到极显著水平;对湿心材比例、边材比例和MOR的影响达到显著水平;对基本密度的径向变异有一定程度的影响,但不改变其变异的一般趋势,即从髓心向外,先下降后呈上升的变化趋势。The effects of different planting densities （1 000,500,250 trees ·hm^-2） on growth factors and wood physical and mechanical properties of Populus × xiaohei T. S. Hvang et Liang were studied in Shuozhou county, Shanxi Province. The results indicated that the effects of planting density on crown width, crown length, DBH, wet-wood areas, sapwood areas,wood basic density, compression strength parallel to grain and MOE were highly significant, and those effects on wetwood proportional, sapwood proportional and MOR were significant. The planting densities had certain effects on the radial variation of wood basic density, but the trends of the radial variation were not changed. The results showed an initially descend and then gentle increase from pith to outward.

关 键 词：栽植密度 小黑杨 树木生长因子 物理力学性质 

分 类 号：S781[农业科学—木材科学与技术]