川西北亚高山草甸放牧退化演替研究  

Study On Grazing Degenerating Succession of Subalpine Meadow in Northwestern of Sichuan Province

作　　者：干友民[1] 李志丹[2] 王钦[1] 泽柏[3] 罗光荣[3] 任永宽[1] 陈愉[3] 

机构地区：[1]四川农业大学草业科学系,四川雅安625014 [2]中国农科院热带牧草研究中心,海南儋州571737 [3]四川省草原研究所,四川红原624400

出　　处：《草地学报》2005年第z1期48-52,共5页Acta Agrestia Sinica

基　　金：四川省科技厅十五科技攻关项目"川西北草地畜牧业可持续发展技术研究与示范"(02NG020-006)

摘　　要：研究不放牧、轻牧、中牧和重牧对四川嵩草群落特征和草地土壤养分的影响。结果表明:亚高山草甸在放牧干扰下的演替序列为:四川嵩草+小嵩草(包括多年生禾草)-多年生杂类草→小嵩草+四川嵩草-多年生杂类草→多年生杂类草→鹅绒委陵菜-高原毛茛+一、二年生杂类草;群落由高大丛生的嵩草群落向低矮耐牧的匍匐型、莲座状植物组成的杂类草群落演变,其间以直立多年生杂类草群落为过渡。Kobresia setchwaneusis community of subalpine meadow in northwestern Sichuan are studied to learn the species community characteristics and the meadows' different soil nutrients under the four grazing intensities, namely, zerograzing, lightgrazing, medium grazing and heavy grazing. The results show that the succession series of subalpline meadows under grazing interference is as follows:Kobresia setchwaneusis+Kobresia Pygmaea(including Perennial grass)-perennial forbs community→Kobresia pygmaea+Kobresia setchwaneusis-perennial forbs community→perennial forbs community→Potentilla anserina-Ranunculus brotherusii+biennial other forbs community. The general trend of succession is from tall thickly growing kobresia community to short prostrating forbs community. The vertical perennial forbs constitute the transitional community.

关 键 词：草原学 亚高山草甸 草地退化 植物群落 土壤养分 

分 类 号：S812.8[农业科学—草业科学]