摘要
采用样带法研究了冬季放牧、冬春季放牧和全年放牧3种放牧管理模式对西藏高寒沼泽草甸高度、盖度、地上生物量及群落结构的影响.研究表明,3种放牧管理模式下的高寒沼泽草甸植被群落物种数差异不显著(p>0.05),高度、盖度和地上生物量差异显著(p<0.05)。冬季放牧、冬春季放牧和全年放牧沼泽草甸地上生物量依次降低。放牧管理对沼泽草甸群落多样性影响较大,不同放牧管理模式下的沼泽草甸Shannon-Wiener指数差异显著(p<0.05),冬春放牧沼泽草甸Shannon-Wiener指数较冬季放牧和全年放牧沼泽草甸低。冬季放牧和全年放牧沼泽草甸Margalef指数和Pielou指数差异不显著,显著(p<0.05)高于冬春季放牧沼泽草甸。
Influence of three kind of grazing management model（winter grazing management,wintry spring grazing management and year-round grazing management） on height,coverage,biomass and community structure of alpine swamp meadow in north Tibet was studied using demo method.Research shows that alpine swamp meadow community species are non significant（p0.05）,while height,coverage and biomass under three grazing management are significantly different（p0.05）.Grazing management has a great influence on alpine swamp meadow community diversity.Shannon-Wiener index of alpine under different grazing management are significant different（p0.05）,showing alpine swamp meadow under wintry spring grazing management lower than which under winter grazing management and year-round grazing management.Margalef index and Pielou index of alpine swamp meadow under winter grazing management and year-round grazing management are non significant（p0.05）,which is significant higher than alpine swamp meadow under winter grazing management.
出处
《生态环境学报》
CSCD
北大核心
2010年第12期2795-2799,共5页
Ecology and Environmental Sciences
基金
国家科技支撑项目(2007BAD63B03)
国家重点基础研究发展计划课题(2010CB951304)
关键词
放牧管理
藏北
高寒沼泽草甸
群落结构
grazing management
north Tibet
alpine swamp meadow
vegetation community structure
