Independence of alpine meadow plants from soil organic matter for nitrogen supply: evidence from stable nitrogen isotopes

NWIPB OpenIR

	Independence of alpine meadow plants from soil organic matter for nitrogen supply: evidence from stable nitrogen isotopes
	Yi, Xianfeng ; Yang, Yueqin
	2007
发表期刊	ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES ; Yi Xianfeng, Yang Yueqin.Independence of alpine meadow plants from soil organic matter for nitrogen supply: evidence from stable nitrogen isotopes.ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES,2007,43(1):51-56
摘要	Stable nitrogen isotope signatures of major sources of mineral nitrogen ( mineralization of soil organic nitrogen, biological N-2 fixation by legumes, annual precipitation and plant litter decomposition) were measured to relatively define their individual contribution to grass assimilation at the Haibei Alpine Meadow Ecosystem, Qinghai, China. The results indicated that delta N-15 values (- 2.40 parts per thousand to 0.97 parts per thousand) of all grasses were much lower than those of soil organic matter (3.4 +/- 0.18 parts per thousand) and mineral nitrogen ( ammonium and nitrate together,7.8 +/- 0.57 parts per thousand). Based on the patterns of stable nitrogen isotopes, soil organic matter (3.4 +/- 0.18 parts per thousand), biological N-2 fixation (0 parts per thousand), and precipitation (- 6.34 +/- 0.24 parts per thousand) only contributed to a small fraction of nitrogen requirements of grasses, but plant litter decomposition (- 1.31 +/- 1.01 parts per thousand) accounted for 67%.; Stable nitrogen isotope signatures of major sources of mineral nitrogen ( mineralization of soil organic nitrogen, biological N-2 fixation by legumes, annual precipitation and plant litter decomposition) were measured to relatively define their individual contribution to grass assimilation at the Haibei Alpine Meadow Ecosystem, Qinghai, China. The results indicated that delta N-15 values (- 2.40 parts per thousand to 0.97 parts per thousand) of all grasses were much lower than those of soil organic matter (3.4 +/- 0.18 parts per thousand) and mineral nitrogen ( ammonium and nitrate together,7.8 +/- 0.57 parts per thousand). Based on the patterns of stable nitrogen isotopes, soil organic matter (3.4 +/- 0.18 parts per thousand), biological N-2 fixation (0 parts per thousand), and precipitation (- 6.34 +/- 0.24 parts per thousand) only contributed to a small fraction of nitrogen requirements of grasses, but plant litter decomposition (- 1.31 +/- 1.01 parts per thousand) accounted for 67%.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/15122
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Yi, Xianfeng,Yang, Yueqin. Independence of alpine meadow plants from soil organic matter for nitrogen supply: evidence from stable nitrogen isotopes[J]. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES, Yi Xianfeng, Yang Yueqin.Independence of alpine meadow plants from soil organic matter for nitrogen supply: evidence from stable nitrogen isotopes.ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES,2007,43(1):51-56,2007.
APA	Yi, Xianfeng,&Yang, Yueqin.(2007).Independence of alpine meadow plants from soil organic matter for nitrogen supply: evidence from stable nitrogen isotopes.ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES.
MLA	Yi, Xianfeng,et al."Independence of alpine meadow plants from soil organic matter for nitrogen supply: evidence from stable nitrogen isotopes".ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES (2007).