摘要
抚育间伐是促进林分生长的基本措施之一。通过对抚育间伐与未抚育间伐的油松(Pinus tabuliformis)林分生长状况和多样性的比较分析,结果表明:(1)抚育间伐对林分的树种组成有一定的影响。(2)抚育间伐后灌木层胡枝子(Lespedeza bicolor)的比例有了明显的降低,而其他灌木的比例除了土庄绣线菊(Spiraea pubescens)外,均有明显的增加,并且分布更加均匀。抚育间伐对改善灌木层植被组成和分布有一定的促进作用。(3)抚育间伐提高了灌木的多样性指数,其林分灌木层物种Margarlef丰富度指数、Simpson多样性指数、Shannon-Wiener多样性指数和Pielou均匀度指数分别为1.33、0.75、1.62和0.83,均高于未抚育间伐林分。
Thinning is one of the basic measure to improve the stand growth.A comparative analysis of the growth status and diversity of forest stands shows that:(1)Thinning has a certain impact on the composition of the forest stand.(2)After thinning,the proportion of Lespedeza bicolor in shrub layer decrease obviously,while the proportion of other shrubs except for Spiraea pubescens in soil increase significantly,and it is more uniform,which indicates that thinning could improve the composition and distribution of vegetation in shrub layer.(3)Tending increase the diversity index of shrubs,Margarlef richness index,Simpson diversity index,Shannon-Wiener diversity index and Pielou evenness index of the shrub layer species is 1.33,0.75,1.62 and 0.83,respectively,which are higher than those of the untended thinning forest.
作者
张鹤
Zhang He(Hebei Mulan Paddock State-owned Forest Farm Beigou Branch,Chengde 068450,China)
出处
《防护林科技》
2020年第6期15-16,共2页
Protection Forest Science and Technology
关键词
抚育间伐
油松林
灌木
多样性
thinning
Pinus tabulaeformis forest
shrub
diversity
