不同退化程度高寒草甸草地生物量及土壤养分差异  

Difference of Biomass and Soil Nutrition in Alpine-cold Meadow of Different Degraded Degree

作　　者：孙小弟[1] 王彦龙[1] 

机构地区：[1]青海省畜牧兽医科学院,西宁810016

出　　处：《青海畜牧兽医杂志》2008年第3期6-8,共3页Chinese Qinghai Journal of Animal and Veterinary Sciences

基　　金：2005年度青海三江源自然保护区生态保护和建设总体规划科研课题及应用推广招标项目(2005-SN-1);国家"十一五"科技支撑计划重大项目(2006BAC01A02)

摘　　要：对三江源区不同退化程度高寒草甸草地植物群落、生物量及土壤养分差异进行了研究,结果表明:随着退化程度的加重,高寒草甸草地的群落组成发生了很大的变化,以莎草科植物为主的植物群落向阔叶型杂类草群落演替;物种多样性、均匀度指数均有下降趋势;地上、地下生物量,土壤养分均呈现明显下降趋势。The difference of plant community, biomass and soil nutrition was determined in alpine-cold meadow of different degraded degree in the area of Three River Source. The results showed that with the aggravation of degraded degree, components of the community were greatly changed that sedge family in alpin-cold meadow. The plant community changed from was dominant communit to that the weed was dominant community,and the species diversity evenness index were the tendency of decrease ; and the above and under-ground biomass, soil nutrition were obvious decrease tendency.

关 键 词：三江源区 退化草地 植物群落 生物量 土壤养分 

分 类 号：S812.8[农业科学—草业科学]