Ⅰ-69速生杨木密度变异特性及其与力学强度的关系  

Variations in Wood Density of Fast-growing Poplar and Its Relationship with Mechanical Strengths

作　　者：夏炎[1] 岳孔[2] 张伟[2] 卢晓宁[2] 

机构地区：[1]西南林业大学,昆明650224 [2]南京林业大学

出　　处：《东北林业大学学报》2010年第10期5-6,共2页Journal of Northeast Forestry University

摘　　要：以I-69杨无性系为研究对象,对木材基本密度、气干密度在轴向上的变异特性进行了研究,并分析基本密度与气干密度之间、基本密度与力学强度之间的相关性。结果表明:密度在轴向上的变异情况不一致,但基本密度的变异程度要大于气干密度的变异程度,密度在轴向上的变化趋势为:沿着树干方向,从下向上密度逐渐变大;气干密度与基本密度有较好的相关性,呈正相关的关系;木材弹性模量、静曲强度、抗压强度与其密度存在着显著的正相关关系,并得出其相关性的模型。An experiment was conducted to study the variations in wood densities of fast-growing Poplar 69（P.deltoides cv.Ⅰ69）.The relationships between basic density and air-dried density and mechanical strength were analyzed.Results show that the variations in basic density and air-dried density are different and the degree of variation of basic density is greater than that of air-dried density.Wood density increases gradually along the trunk from the bottom up.There is a positive co-rrelation between air-dried density and basic density.Significant correlations between density and modulus of elasticity,modulus of rupture,compressive strength were also found,and the correlation models were given.

关 键 词：基本密度 气干密度 变异特性 力学强度 

分 类 号：S781[农业科学—木材科学与技术]