不同类型毛竹林植物物种多样性研究

Study on the Species Diversity at Moso Bamboo Stands of Different Type

通过对不同类型毛竹林植物物种多样性的研究,结果表明:毛竹林内物种是丰富的,但较大部分物种是脆弱的;乔木层植物物种多样性指数与林下木本植物物种多样性指数相关显著,与草本植物物种多样性指数相关不显著,乔木层物种多样性指数小于林下植物物种多样性指数;木本植物物种多样性指数,竹阔混交林>竹针混交林>毛竹纯林,粗放经营竹林>中等集约经营竹林>集约经营竹林;林下草本植物物种多样性指数,竹针混交林>毛竹纯林>竹阔混交林,中等集约经营竹林>粗放经营竹林>集约经营竹林;竹阔混交林向毛竹纯林转型时,林下木本植物部分丧失,而草本植物将可能增加,也可能减少。

The species diversity of different moso bamboo stands were researched at Yongan, Fujian Province, which was main distribution region of moso bamboo. The results were showed as follows ： （ 1 ） The speceis in moso bamboo stands was abandant but lots of species were endangered. （2） The species diversity of tree layer correlated signifi- cantly with species diversity of shrub layer, but poorly with species diversity of herbage layer. The species diversity index of tree layer was lower than those of shrub and herbage layer. （3） The numerical relationship of species diver- sity index at moso bamboo stands of different type were bamboo mixed stand with hardwood 〉 bamboo mixed stand with conifer 〉 pure bamboo stand, and extensive management bamboo stand 〉 mid-intensive management bamboo stand 〉 intensive management bamboo stand at the tree and shrub layer. （4） The numerical relationship of species diversity at herbage layer were bamboo mixed stand with conifer 〉 pure bamboo stand 〉 bamboo mixed stand with hardwood and mid-intensive mangament bamboo stand 〉 extensive management bamboo stand 〉 intensive manage- ment bamboo stand. （5） When bamboo mixed stands with hardwood were turned into pure bamboo stands, lots of tree species under canopy would be lost easily, but the amount of herbage species under canopy might be inceased or decreased too.