Effects of temperature, glucose and inorganic nitrogen inputs on carbon mineralization in a Tibetan alpine meadow soil

NWIPB OpenIR

	Effects of temperature, glucose and inorganic nitrogen inputs on carbon mineralization in a Tibetan alpine meadow soil
	Song, Minghua ; Jiang, Jing ; Cao, Guangmin ; Xu, Xingliang
	2010-11-01
发表期刊	EUROPEAN JOURNAL OF SOIL BIOLOGY ; Song, MH; Jiang, J; Cao, GM; Xu, XL.Effects of temperature, glucose and inorganic nitrogen inputs on carbon mineralization in a Tibetan alpine meadow soil,EUROPEAN JOURNAL OF SOIL BIOLOGY,2010,46(6):375-380
摘要	High levels of available nitrogen (N) and carbon (C) have the potential to increase soil N and C mineralization We hypothesized that with an external labile C or N supply alpine meadow soil will have a significantly higher C mineralization potential and that temperature sensitivity of C mineralization will increase To test the hypotheses an incubation experiment was conducted with two doses of N or C supply at temperature of 5 15 and 25 C Results showed external N supply had no significant effect on CO(2) emission However external C supply increased CO(2) emission Temperature coefficient (Q(10)) ranged from 113 to 1 29 Significantly higher values were measured with C than with N addition and control treatment Temperature dependence of C mineralization was well-represented by exponential functions Under the control CO(2) efflux rate was 425 g CO(2)-Cm(-2) year(-1) comparable to the in situ measurement of 422 g CO(2)-Cm(-2) year(-1) We demonstrated if N is disregarded microbial decomposition is primarily limited by lack of labile C It is predicted that labile C supply would further increase CO(2) efflux from the alpine meadow soil (C) 2010 Elsevier Masson SAS All rights reserved; High levels of available nitrogen (N) and carbon (C) have the potential to increase soil N and C mineralization We hypothesized that with an external labile C or N supply alpine meadow soil will have a significantly higher C mineralization potential and that temperature sensitivity of C mineralization will increase To test the hypotheses an incubation experiment was conducted with two doses of N or C supply at temperature of 5 15 and 25 C Results showed external N supply had no significant effect on CO(2) emission However external C supply increased CO(2) emission Temperature coefficient (Q(10)) ranged from 113 to 1 29 Significantly higher values were measured with C than with N addition and control treatment Temperature dependence of C mineralization was well-represented by exponential functions Under the control CO(2) efflux rate was 425 g CO(2)-Cm(-2) year(-1) comparable to the in situ measurement of 422 g CO(2)-Cm(-2) year(-1) We demonstrated if N is disregarded microbial decomposition is primarily limited by lack of labile C It is predicted that labile C supply would further increase CO(2) efflux from the alpine meadow soil (C) 2010 Elsevier Masson SAS All rights reserved
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/15397
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	Song, Minghua,Jiang, Jing,Cao, Guangmin,et al. Effects of temperature, glucose and inorganic nitrogen inputs on carbon mineralization in a Tibetan alpine meadow soil[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY, Song, MH; Jiang, J; Cao, GM; Xu, XL.Effects of temperature, glucose and inorganic nitrogen inputs on carbon mineralization in a Tibetan alpine meadow soil,EUROPEAN JOURNAL OF SOIL BIOLOGY,2010,46(6):375-380,2010.
APA	Song, Minghua,Jiang, Jing,Cao, Guangmin,&Xu, Xingliang.(2010).Effects of temperature, glucose and inorganic nitrogen inputs on carbon mineralization in a Tibetan alpine meadow soil.EUROPEAN JOURNAL OF SOIL BIOLOGY.
MLA	Song, Minghua,et al."Effects of temperature, glucose and inorganic nitrogen inputs on carbon mineralization in a Tibetan alpine meadow soil".EUROPEAN JOURNAL OF SOIL BIOLOGY (2010).