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研究了毛白杨优树花枝基因库中的年龄效应以及来源于根萌条的无性系测定林的幼化效果，结果表明：１．毛白杨生长性状的年龄效应较明显，与优树年龄呈线性相关，煤污病、叶部性状等与优树年龄的１～３次多项式回归均不显著，基本上不受年龄效应的影响，树干通直度与优树年龄呈３次多项式回归关系；２．无性系测定林各无性系的生长正常，与原优树的年龄相关不显著，年龄或龄级的方差分量也未达显著性水平，因此根萌条幼化效果良好，且消除了优树年龄间的差异．
The age effect of Populus tomentosa Poplar tree in the gene pool and the juvenile effect of clonal plantation derived from root sprouts were studied. The results showed that: 1. The age effect of growth traits of Populus tomentosa was more obvious, which was linearly correlated with the age of elite trees. The 1 to 3 times polynomial regression of coal stains, leaf traits and elite tree age were not significant, and were basically unaffected by the age effect. Tree trunk straightness and superior tree age showed a 3 degree polynomial regression; 2. Clonal determination Lin clones normal growth, age and age of the original tree is not significant, nor the variance of age or age level did not reach the significant level, so the root sprouting seedling effect is good, and eliminate the tree age The difference between.