高山嵩草—苔草草地的植被演替  

Plant Succession of Kobresia—Carex Type in Alpine Grassland

作　　者：李光棣[1] 符义坤[1] 贾笃敬[1] 

机构地区：[1]甘肃农业大学草原系,兰州730070

出　　处：《草业学报》1993年第1期28-32,共5页Acta Prataculturae Sinica

基　　金：国家自然科学资助课题

摘　　要：本文以生态位理论为指导,就广泛分布于青藏高原的嵩草—苔草草地在放牧条件下演替的过程和机理进行了研究,结果表明这类草地在放牧条件下演替有四个阶段:珠芽蓼+线叶嵩草—苔草群落(Ⅰ);线叶嵩草+苔草—垂穗鹅观草群落(Ⅱ);线叶嵩草+苔草—毛茛+甘肃马先蒿群落(Ⅲ);苔草+多茎委陵菜—毛茛+钝叶银莲花群落(Ⅳ);其衰退序列是Ⅰ→Ⅱ→Ⅲ→Ⅳ。封育可使群落中优良牧草的生态体积增大,使草地向进展方向演替。Succession of Kobresia—Carex alpine meadow and its mechanism under grazing conditions were studiedin the light of niche theory.Results showed that the four stages of succession existed in the successional seri-es of Kobresia—Carex meadow,and the trend of succession could be changed through enlarging the nichevolumes of herbage by the improvements of fencing,fallowing,fertilizing and controlled grazing.

关 键 词：高山草地 演替 苔草 

分 类 号：S812.3[农业科学—草业科学]