Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau

NWIPB OpenIR

	Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau
	Du, Yangong ; Cui, Yingguang ; Xu, Xingliang ; Liang, Dongying ; Long, Ruijun ; Cao, Guangmin
	2008-10-01
发表期刊	PLANT AND SOIL ; Du Yangong,Cui Yingguang,Xu Xingliang,Liang Dongying,Long Ruijun,Cao Guangmin.Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau.PLANT AND SOIL,2008,311(1-2):245-254
摘要	Nitrous oxide (N2O) emission was measured in a Kobresia humilis meadow and a Potentilla fruticosa meadow in the Qinghai-Tibet Plateau from June 2003 to July 2006. Five treatments were setup in the two alpine meadows. Two bare soil treatments were setup in the K. humilis meadow (BSK) and in the P. fruticosa meadow (BSP) by removing the above- and belowground plant biomass. Three plant community treatments were setup with one in the K. humilis meadow (herbaceous community in the K. humilis meadow-HCK) and two in the P. fruticosa meadow (herbaceous community in the P. fruticosa meadow-HCP, and shrub community in the P. fruticosa meadow-SCP). Nitrous oxide emission from BSP was estimated to be 38.1 +/- 3.6 mu g m(-2) h(-1), significantly higher than from BSK (30.2 +/- 2.8 mu g m(-2) h(-1)) during the whole experiment period. Rates from the two herbaceous blocks (HCK and HCP) were close to 39.5 mu g m(-2) stop h(-1) during the whole experimental period whereas shrub community (SCP) showed significant high emission rates of N2O. Annual rate of N2O emission was estimated to be 356.7 +/- 8.3 and 295.0 +/- 11.6 mg m(-2) year(-1) from the alpine P. fruticosa meadow and from the alpine K. humilis meadow, respectively. These results suggest that alpine meadows in the Qinghai-Tibetan Plateau are an important source of N2O, contributing an average of 0.3 Tg N2O year(-1). We concluded that N2O emission will decrease, due to a predicted vegetation shift from shrubs to grasses imposed by overgrazing.; Nitrous oxide (N(2)O) emission was measured in a Kobresia humilis meadow and a Potentilla fruticosa meadow in the Qinghai-Tibet Plateau from June 2003 to July 2006. Five treatments were setup in the two alpine meadows. Two bare soil treatments were setup in the K. humilis meadow (BSK) and in the P. fruticosa meadow (BSP) by removing the above- and belowground plant biomass. Three plant community treatments were setup with one in the K. humilis meadow (herbaceous community in the K. humilis meadow-HCK) and two in the P. fruticosa meadow (herbaceous community in the P. fruticosa meadow-HCP, and shrub community in the P. fruticosa meadow-SCP). Nitrous oxide emission from BSP was estimated to be 38.1 +/- 3.6 mu g m(-2) h(-1), significantly higher than from BSK (30.2 +/- 2.8 mu g m(-2) h(-1)) during the whole experiment period. Rates from the two herbaceous blocks (HCK and HCP) were close to 39.5 mu g m(-2) stop h(-1) during the whole experimental period whereas shrub community (SCP) showed significant high emission rates of N(2)O. Annual rate of N(2)O emission was estimated to be 356.7 +/- 8.3 and 295.0 +/- 11.6 mg m(-2) year(-1) from the alpine P. fruticosa meadow and from the alpine K. humilis meadow, respectively. These results suggest that alpine meadows in the Qinghai-Tibetan Plateau are an important source of N(2)O, contributing an average of 0.3 Tg N(2)O year(-1). We concluded that N(2)O emission will decrease, due to a predicted vegetation shift from shrubs to grasses imposed by overgrazing.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/20126
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	Du, Yangong,Cui, Yingguang,Xu, Xingliang,et al. Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau[J]. PLANT AND SOIL, Du Yangong,Cui Yingguang,Xu Xingliang,Liang Dongying,Long Ruijun,Cao Guangmin.Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau.PLANT AND SOIL,2008,311(1-2):245-254,2008.
APA	Du, Yangong,Cui, Yingguang,Xu, Xingliang,Liang, Dongying,Long, Ruijun,&Cao, Guangmin.(2008).Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau.PLANT AND SOIL.
MLA	Du, Yangong,et al."Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau".PLANT AND SOIL (2008).