东祁连山杜鹃灌丛草地灌木受损恢复生长的研究

Studies on shrub restoration of Rhododendron shrublands under disturbance in eastern Qilian mountains

对受到砍伐和滑坡影响的东祁连山杜鹃灌丛草地灌木植物的恢复生长研究表明,砍伐后,灌木恢复到原群落的程度依次为金露梅>鬼箭锦鸡儿>柳>头花杜鹃>千里香杜鹃>烈香杜鹃,滑坡条件下各灌木的恢复程度与砍伐样地相似,说明金露梅、鬼箭锦鸡儿和柳能够快速适应新的生境条件,充分利用新生境条件下的各种资源进行恢复生长,在群落恢复演替的前期生长速度较快,而杜鹃属植物不能较好地适应新的生境条件,再生恢复速度相对迟缓。

The restoration growth of shrubs in Rhododendron community under landslip and deforestation disturbance in eastern Qilian mountains was studied with height, coverage and aboveground phytomass of shrubs from 1997 to 2000. The results indicated that the order of shrub restoration degree after disturbance was Potentilla fruticosa > Caragana jubata > Salix spp. > R. capitatum> R. thymifolium > R. anthopogonoides. P.fruticosa and C.jubata showed stronger restoration because of their adaptability to disturbed ecological conditions. On the contrary, the regrowth performance of dominant Rhododendron was poor since they could not adapt the new conditions rapidly.