摘要
在新疆巴音布鲁克高寒草原,根据样方调查资料,通过测定围封22年后紫花针茅群落的特征值,并与围栏外作对照,就围栏封育对退化高寒草原植被特征的影响进行了分析。结果表明:对退化高寒草原实施长期的围栏封育,群落物种数目比围栏外增加23.77%;围栏内禾本科优良牧草比围栏外大量增加,杂类草较围栏外明显降低;群落物种多样性指数和均匀度指数均比围栏外减小;地上生物量较围栏外明显增加,其中禾本科牧草较围栏外增加66.46%。因此,从高寒草原生产利用角度看,构建围栏对于退化高寒草原的恢复和畜牧业的发展是有益的。
In order to analyze the effects of enclosure on vegetation characteristics in degenerated grassland,characteristics of Stipa purpurea steppe grassland communities which have enclosed for 22 years in Xinjiang Bayanbulak alpine grassland were investigated.It turned out that the species inside the enclosure increased by 23.77%,fine perennial grasses increased on the contrary the weeds decreased obviously;the community diversity and evenness index decreased,above-ground biomass was increased,and gramineal forag...
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2009年第1期197-200,共4页
Journal of Arid Land Resources and Environment
基金
中国科学院新疆生态与地理研究所前沿领域项目(20049016)资助
关键词
高寒草原
围封
物种组成
物种多样性
地上生物量
alpine steppe long-term exclosure
species composing
species diversity
above-ground biomass
