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讨论了１１年生的Ⅰ－６３杨、Ⅰ－６９杨和Ⅰ－７２杨三个无性系在株行距分别为４ｍ×４ｍ、５ｍ×５ｍ、６ｍ×６ｍ和７ｍ×７ｍ四个造林密度条件下木材ｐＨ值和脲醛树脂胶的固化时间。结果表明，心材的ｐＨ值和脲醛树脂胶固化时间均大于边材；Ⅰ－７２杨心材的ｐＨ值大于Ⅰ－６３杨和Ⅰ－６９杨。方差分析表明无性系之间以及株行距之间与脲醛树脂肢固化的间的差异均不显著。
This paper discussed the effects of 11-year-old I-63 poplar, I-69 poplar and I-72 poplar on the wood density of 4m × 4m, 5m × 5m, 6m × 6m and 7m × 7m pH and urea resin curing time. The results showed that the pH value of the heartwood and the curing time of urea-formaldehyde resin were all higher than those of sapwood. The pH value of Ⅰ-72 was higher than that of Ⅰ-63 and Ⅰ-69. Analysis of variance showed that there was no significant difference between the clones and between the row spacing and urea-formaldehyde resin limb immobilization.