【摘要】 通过间伐强度对人工林长白落叶松 (Larixolgensis)建筑材材质进行系统测定、统计分析 ,结果表明 :间伐强度对建筑材材质有很大的影响 ,落叶松的晚材率、生长轮密度、差异干缩、抗弯强度、顺纹抗压强度、抗弯弹性模量、冲击韧性差异显著 ;生长轮宽度差异不显著。采用综合坐标法 ,对不同初植密度的林分建筑材材质进行评定 ,其优劣顺序为 2 .0m× 2 .0m ,2 .5m× 2 .5m ,3.0m× 3.0m ,1.5m× 2 .0m。更多还原

【Abstract】 Journal of Northeast Forestry University.-2003,31(1).-6～8 Systematic determination and statistical analysis of Lalix olgensis plantation under different thinning density show that thinning density has great effect on structural wood quality. Significant differences exist in late wood rate, growth-ring density, bending strength, compressive strength along grain, bending elastic modulus and impact toughness. The difference of growth-ring width is not significant. By comprehensive coordinate, the structural wood quality at different planting density were evaluated. The preferential order are 2.0 m×2.0 m, 2.5 m×2.5 m, 3.0 m×3.0 m, 1.5 m×2.0 m.更多还原