摘要
通过对朝阳县二十家子镇杨树林地采取人工间伐和保持林分原状 2种经营形式的对比试验得出 :过密林分经间伐 ,林木连年生长量显著 ;不进行间伐的过密林分 ,林木生长缓慢 ,树势老化衰退 ,枯立木和病虫害木增多 。
Comparison of poplar stands thinned with no thinned in the forest farm in Chaoyang County indicated that the Current annual increment of the dense stand through thinning raised obviously. The growth of dense stand not thinned was slower, growing power was feeble,and diseases and pests were serious.
出处
《防护林科技》
2004年第z1期38-39,共2页
Protection Forest Science and Technology
关键词
过密林分
间伐
生长量
测定
dense stand
thinning
growth
determination
