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.
出处
《草业学报》
CSCD
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
关键词
高山草地
演替
苔草
Alpine meadow
succession
niche
