近年来,我县引进了一部分速生的杂交杨树,受到了广大群众的欢迎。但如何进行合理修枝,促进杨树速生丰产,是当前生产中急待解决的课题。为了解决合理修枝问题,实现速生丰产的愿望,我们从1972年起,学习了外地的修枝经验,并结合果树修枝原理,在生产实践中进行不同的修枝对比实验,取得了一些成效,现介绍如下: In recent years, our county has introduced some fast-growing hybrid poplar trees and has been welcomed by the masses. However, how to carry out reasonable pruning to promote poplar fast-growing and yielding is an urgent issue in current production. In order to solve the problem of pruned pruning and to realize the goal of fast growing and high yielding, we learned the experience of pruning in the field since 1972, combined with the principle of pruning fruit trees, and carried out different pruning experiments in production practice, and achieved some results , Are introduced as follows: