摘要
以华北落叶松人工林为研究对象,采用30m的样带法,比较了林分草本植物丰富度和生物量的变化规律。结果表明:华北落叶松人工林林缘草本植物Menhinick丰富度指数随距林缘距离的增大而减小。密度为630株/hm2时,随林缘距离的变化不明显,其他密度林分林缘草本植物Menhinick丰富度指数与距林缘距离呈明显的幂函数关系,相关系数均大于0.873 5。低密度林分林下草本植物生长好于高密度林分,不同林分林下草本植物生物量与林分密度呈明显的幂函数关系。草本植物Menhinick丰富度指数和生物量能较好地反映华北落叶松的林缘效应。
Using the 30 m transect method the variation of the forest herb richness and bio-mass of Larix principis-rupprechtii plantation was compared .The results showed Larix principis-rupprechtii edge herb Menhinick richness decreased with increasing distance from the forest edge .When at density of 630 trees perhectare ,there was no obvious forest edge distance variety ,with herbaceous Menhinick richness index at the other edge forest stand density having an apparent power correlation to the forest edge distance and its coefficient R was greater than 0 .873 5 .Understory herbs were doing better at low density than high density ,and different understory herbaceous plant biomass and stand density showed a significant exponential relationship .Herb Menhinick richness and biomass can better reflect the forest edge effect of Larix principis-rupprechtii .
出处
《河北林果研究》
2014年第3期241-244,共4页
Hebei Journal of Forestry and Orchard Research
基金
河北省林业厅科技项目"冀北山区森林生态系统健康评价技术研究(1403451)"
林业公益性行业科研专项子课题"冀北山区典型森林生态系统健康经营技术研究与示范"(200804022F)
河北省林业科学技术研究项目"冀北山地典型林分类型结构特征研究"(1212436)
林业公益性行业科研专项课题"京津城市森林生态服务功能研究"(201204108)
关键词
华北落叶松
林缘
植物丰富度
Larix principis-rupprechtii
forest edge
species richness
