【作者】 夏炎； 卢晓宁；

【机构】 云南省昆明市西南林学院； 江苏南京市南京林业大学；

【摘要】 以14至18年树龄的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、胸径并分析其与木材密度之间的相关性,结果表明:密度在0-4m处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,符合渡道冶人关于密度变化趋势理论中的Ⅰ;木材密度与树龄、胸径之间有联系,并建立了密度与树龄和胸径的模型,对模型进行检验,用该模型模拟速生杨木基本密度的结果较为理想。更多还原

【Abstract】 The fast-growing Poplar 69 ( P. deltoides cv.Ⅰ69) were researched in this paper. The variation of wood density and the variation patterns were studied, and analyzed the relationship between the density with the age of the tree and DBH(diameter of breast height). The results showed: The trend of density variation in axial direction is: it will be increased along axial direction. The relationship of the wood density with age of the tree and DBH(diameter of breast height) were modeled. The model was tested and the result indicated that the goodness of simulation was better.更多还原