速生杨木材基本密度变异规律及其与生长性状的关系  

Variation Patterns and Relationship between Density and Growth Properties of Fast-growing Poplar

作　　者：夏炎[1] 张伟[2] 岳孔[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8期14-17,共4页Journal of Northeast Forestry University

摘　　要：以14～18a树龄的I-69杨无性系为研究对象,对木材基本密度在株内不同高度上的变异模式及其变异性进行了研究,测定了树龄、胸径及生长轮宽度并分析其与木材密度之间的相关性。结果表明:0～6m处,密度在轴向上沿着树干方向,从下向上密度逐渐变大;木材密度与树龄、胸径之间有关联,并建立了密度与树龄和胸径的模型。并对模型进行检验,认为用该模型模拟速生杨木基本密度的结果较为理想。分析密度与生长轮宽度之间的相关关系,可以得知密度与生长轮宽度显著相关,生长速度越快,树木密度越小,并得出模型。An experiment was conducted to study the variation in wood basic density and its variation patterns of 14-18-year-old fast-growing poplar 69 （P. deltoides cv. 1 69） at different tree height levels. Tree age, diameter at breast height （DBH） and growth ring width were measured, and the relationships between density and tree age, DBH were analyzed. Results indicated that the wood density along the stem gradually increased from the bottom up at a tree height of 0-6 m. The wood density was correlated with tree age and DBH, and a regressive model between wood density and tree age and DBH was established. The model checking result proved that the model could well predict the basic density of fast-growing poplar 69. Density increased with decreasing growth ring width, and a model was also established.

关 键 词：基本密度 变异规律 树龄 胸径 生长轮宽度 材性 生长速度 

分 类 号：X361.2[环境科学与工程—环境工程]