Nitrous Oxide Emissions from Newly Created Littoral Marshes in the Drawdown Area of the Three Gorges Reservoir, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 成都山地所知识仓储（2009年以前）

	Nitrous Oxide Emissions from Newly Created Littoral Marshes in the Drawdown Area of the Three Gorges Reservoir, China
	Gao, Yongheng
	2010
关键词	Water regime Temporal variations N cycling Three Gorges Dam
ISSN号	0049-6979
英文摘要	This study aimed to understand the seasonal and spatial variations of N(2)O emissions from newly created littoral marshes in the drawdown area of the Three Gorges Reservoir (TGR), China. We measured N(2)O emissions at 10-day intervals during the growing season (early July to late September) in 2008. N(2)O emissions were measured with static chambers in four typical vegetation stands. The results showed great spatial variations of N(2)O emissions among the four stands. The greatest N(2)O emissions (0.052 +/- 0.063 mg N(2)O m(-2)h(-1)) were from Scirpus triqueter stand, while the lowest N(2)O emissions (0.020 +/- 0.020 mg N(2)O m(-2) h (1)) were from Typha angustifolia stand. To such spatial variations in N(2)O emissions, standing water depths and soil water content may be important explaining factors. Besides spatial variations, we also found significant temporal variations of N(2)O emissions in this area. The temporal variation of N(2)O emissions in the growing season was not found significantly related to any measured factor in the study. However, based on principal component analysis, we consider it partly caused by thermal conditions and the marked temporal variation of the standing water depth in the growing season, which to some degree influenced the process of denitrification and N(2)O emissions. These results about TGR enable us to make a more reasonable estimate of N(2)O emissions from large dam reservoirs, particularly those with a large drawdown area in the growing season in an agricultural landscape.
语种	英语
页码	25–33
出处	WATER AIR AND SOIL POLLUTION
卷号	211
收录类别	SCI
WOS记录号	WOS:000282159200004
通讯作者	Yuan, XZ
内容类型	其他
源URL	[http://ir.imde.ac.cn/handle/131551/5590]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
推荐引用方式 GB/T 7714	Gao, Yongheng. Nitrous Oxide Emissions from Newly Created Littoral Marshes in the Drawdown Area of the Three Gorges Reservoir, China. 2010-01-01.