译 名：
Element Composition of Nostoc commune and Xanthoparmelia camtschadalis under Grazing Pasture and Their Relations with Stocking Rates
作 者：
Li Xiangzhen; Niu Haishan; Sun Tiejun; Chen Zuozhong(Institute of Botany,Chinese Academy of Sciences, Beijing 100093)(Institute of Natural Resources,Inner Mongolian University,Huhhot 010021)
关键词：
Xanthoparmelia camtschadalis(Ach.) Hale; Nostoc commune; Stocking rates; Element composition
摘 要：
Element contents and proportions of soluble elements in Xanthoparmelia camtschadalis (Ach.) Hale and Nostoc commune,and relationships of element contents in lichen with stocking rates were investigated in a pasture of Ieymus Chinensis steppe. The results indicated that:both in lichen and Notoc commune, C, N and Ca concentrations are high level, >1%; P,Mg K, Fe concentrations are middle level,between l to 0.1%; Na, Mn, Cu, Zn, and B concentrations are low level, <0.1%. The soluble N in Nostoc commune account for 21 % of total N. With stocking rates increasing,C concentration decreased,meanwhile N increased. C/N ratio is smaller in moderate and heavy grazing treatments. The contents of Ca、Mg、K、Fe、Mn、Cu inlichen are lower in control, and higher in grazing treatments. P, Na, Zn and B contents are higher in treatments of control,hight and extremely grazing intensity.
