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

	Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau
	Du, Yangong 1,2; Cui, Yingguang 3; Xu, Xingliang 4; Liang, Dongying 1; Long, Ruijun 5; Cao, Guangmin 1
刊名	plant and soil
	2008-10-01
卷号	311 期号:1-2 页码:245-254
关键词	nitrous oxide Kobresia humilis meadow Potentilla fruticosa meadow Tibetan Plateau soil moisture soil temperature
合作状况	其它
中文摘要	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.
英文摘要	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.
学科主题	农学
WOS标题词	science & technology ; life sciences & biomedicine
类目[WOS]	agronomy ; plant sciences ; soil science
研究领域[WOS]	agriculture ; plant sciences
关键词[WOS]	agricultural soils ; n2o emissions ; grassland ; ch4 ; co2 ; ecosystem ; respiration ; temperature ; management ; atmosphere
收录类别	SCI
语种	英语
WOS记录号	WOS:000259042800021
公开日期	2009-12-04
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/1194]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Qinghai, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Second High Sch Binzhou, Binzhou 256621, Shandong, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China 5.Lanzhou Univ, Sch Pastoral Agr Sci & Technol, Lanzhou 730020, Gansu, Peoples R China
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,2008,311(1-2):245-254.
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,311(1-2),245-254.
MLA	Du, Yangong,et al."Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau".plant and soil 311.1-2(2008):245-254.