青藏高原高寒草甸植被与土壤特征  

Comparisons of vegetation and soil characteristics of Qinghai-Tibet Plateau

作　　者：张东杰[1] 

机构地区：[1]青海畜牧兽医职业技术学院农林科学系,青海西宁812100

出　　处：《草业科学》2015年第2期269-273,共5页Pratacultural Science

基　　金：农业部公益性行业专项(201203007);青海省高校"135高层次人才培养工程"

摘　　要：利用样方法,分析了青藏高原不同植被类型生物量、土壤理化性状及土壤微生物数量。结果表明,高山柳(Salix paraqplesia)灌丛草甸的地上生物量显著高于圆穗蓼(Polygonum macrophyllum)草甸、藏嵩草(Kobresia tibetica)草甸和小嵩草(K.pygmaea)草甸(P≤0.05),而藏嵩草草甸的地下生物量显著高于小嵩草草甸、高山柳灌丛草甸和圆穗蓼草甸(P≤0.05)。藏嵩草草甸的土壤有机质、土壤全氮依次高于圆穗蓼草甸、高山柳灌丛草甸和小嵩草草甸。相反,土壤养分居于中间水平,土壤含水量较低的圆穗蓼草甸土壤微生物数量则最多。The present study analyzed the plant biomass,soil physical and chemical properties and soil microbial quantities of different community composition using quadrat sampling method.The results showed the aboveground biomass of Salix paraqplesia alpine shrubs meadow was significantly higher(P<0.05)than that of Polygonum macrophyllum meadow,Kobresia tibetica swamp meadow and K.pygmaea meadow,successively.The underground biomass of K.tibeticaswamp meadow was significantly higher(P<0.05)than that of K.pygmaea meadow,S.paraqplesia shrubs meadow and Potentilla fruticosa meadow,successively.Soil organic matter and soil total nitrogen of K.tibetica swamp meadow were higher than those of P.macrophyllum meadow,S.paraqplesia shrubs meadow and K.pygmaea meadow.On the contrary,the soil microbial quantities of P.macrophyllum meadow which had middle level of soil nutrients contents were largest.

关 键 词：青藏高原 群落组成 土壤理化性状 土壤微生物数量 

分 类 号：S812.2[农业科学—草业科学]