【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。更多还原

【Abstract】 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.更多还原