彰武小钻杨间伐效果的研究

Study on Effect of Thinning on Populus solanum in Zhangwu

为研究彰武小钻杨间伐效果,按49.8%、35.5%、31.8%和对照4种间伐强度,对株行距2 m×4 m的6年生彰武小钻杨进行了间伐试验,结果表明:间伐初期对胸径影响较小,后期逐渐增大;间伐初期对树高影响较大,后期逐渐减小;随着间伐强度加大,单株材积明显增大;不同间伐强度对大中径级林木株数的比例有较大影响,强度越大,大中径级林木株数所占比例越高。

In order to study the thinning effect,six-year-old Populus solanum in Zhangwu with rowing space of 2 m×4 m selected,four thinning intensities with 49.8%,35.5%,31.8%and check were set up.The results showed that the effect of thinning on DBH was small at early stage,but gradually increased in the later stage.Thinning had a great influence on tree height at early stage,but gradually decreased at later stage.With the increase of thinning intensity,the volume per plant increased significantly.Different thinning intensities have great influence on the proportion of tree number of medium and large diameter class.The greater the intensity,the higher the proportion of tree number of medium and large diameter class.