摘要
在辽宁清原县选择25 年生落叶松人工林进行近自然化改造,以不间伐林分作为对照,研究 近自然化改造对林分生长和林下草本层植物多样性的影响。结果表明:间伐1年后,间伐林分平 均胸径和林分材积生长量及生长率均高于对照,差异显著(p<0.05)。在间伐林分中,目标树的胸 径生长量显著高于一般林木的胸径生长量。近自然化改造显著地提高了林下草本层植物多样性, 间伐林分林下草本层丰富度指数和Shannon-Wiener多样性指数高于对照。因此,近自然化改造促 进了人工落叶松林的林分生长,提高了林下草本层植物多样性,有利于目标树的持续快速生长。 今后经营落叶松中龄人工林时,应多关注目标树的生长。
This study was carried out in 25-year-old Larix spp. plantation in Qingyuan. Effects of close-to-nature transfor- mation managements on forest growth and plant diversity in herb layer were studied, and stands without thinning were taking as control. Results showed that: one year after thinning, the increments in diameter and volume of thinning forests were significantly higher than those in control plots (p<0.05). The diameter increments of target trees were significantly higher than those of general trees in thinning plot. Thinning can improve the plant diversity of herb layer, the abundance index and the Shannon-Wiener index of thinning plot were significantly higher than those of control plot. Close-to-natu- ral forest management in Larix spp. plantation could promote the stand growth , improve plant diversity in herb layer, and benefit sustained and rapid growth of the target tree.
作者
丁磊
李庆军
DING Lei;LI Qingjun(Liaoning Provincial Institute of Forest Management,Dandong 118002,China;Liaoning Highway Operation Co.,Ltd.Huludao Branch,Huludao 125000,China)
出处
《辽宁林业科技》
2019年第5期5-7,49,共4页
Liaoning Forestry Science and Technology
基金
辽宁省科学事业公益研究基金(20180001)
关键词
近自然化改造
生长效应
目标树
植物多样性
close-to-natural forest management
growth effect
target tree
plant diversity
