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作 者 ：骆秀琴 文小明 管宁 黄东森

期 刊 ：林业科学 1997年 33卷 1期 页码：75-82

关键词：木材密度；径向变异模式；欧美杨；无性系；

Keywords:wood density, Radial variation pattern, Populus×euramericana, Clone,

摘 要 ：以微密度分析对17个欧美杨无性系木材密度径向变异模式进行了初步研究。主要结果是:各无性系各株木材密度株内径向变异曲线概貌大体一致。但相同母本的不同无性系间以至无性系内株间都存在一定的差异。因此,对变异模式的描述必然带有一定的不确定性。不同年龄上的年轮平均密度在无性系间差异显著。不同无性系的年轮平均密度变异曲线间存在一定程度的交叉。但无性系间的年-年相关显著,表明了在无性系间进行早期选择的可行性。年轮平均密度与年轮内最大、最小密度的关系,在年龄影响下和无性系影响下的两个变异过程中分析,结果有差别。年轮平均密度与年轮宽度的关系在年龄影响下的变异过程中分析,表现为不显著的负相关,而在无性系影响下的变异过程中分析,多数情况下相关显著。

Abstract:The radial variation patterns of wood density in 17 Populus×euramericana clones were studied by x-ray wood densitometry．The main results obtained are:1)The general trends of the density profiles of the trees were similar，while there existed a certain degree of variations among clones and even within a clone．Therefore，the indefiniteness in describing the variation patterns is inevitable．2)There existed significant differences in the average ring densities at various ages.3)The interclonal age-age coorelations of the average ring density were significant，indicating the feasibility of the early selection among clones．4)The correlations between average ring density and maximum and minimum densities in the variation affected by ages differed from those affected by clones．Significant negative correlations between ring density and ring width were shown in the variation affected by clones．

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