Nitrogen pollution and sources in an aquatic system at an agricultural coastal area of Eastern China based on a dual-isotope approach

doi:10.1007/s11356-019-05665-2

	Nitrogen pollution and sources in an aquatic system at an agricultural coastal area of Eastern China based on a dual-isotope approach
	Li, Yanqiang 1,2; Yan, Weijin 1; Wang, Fang 1; Lv, Shucong 1,2; Li, Qingqian 1,2; Yu, Qibiao 1,2
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2019-08-01
卷号	26 期号:23 页码:23807-23823
关键词	Nitrogen pollution Dual isotopes Cropping systems Intensive agricultural activities Aquatic systems Jiaozhou Bay
ISSN号	0944-1344
DOI	10.1007/s11356-019-05665-2
通讯作者	Yan, Weijin(yanwj@igsnrr.ac.cn)
英文摘要	Nitrogen (N) pollution of water courses is a major concern in most coastal watersheds in eastern China with intensive agricultural production. We use hydrogeological and dual-isotopic approaches to analyze the N concentrations, pollution, transformations, and sources of surface water and groundwater in an agricultural watershed of the Jiaozhou Bay (JZB) area. Results showed that dissolved total N (DTN) concentrations in sub-rivers (SRs) ranged from 6.0 to 25.3mg NL-1 in the dry season and 9.1-26.7mg NL-1 in the wet season, which indicated a positive relationship with the percentages of agricultural land. Meanwhile, the dominant dissolved N species in SRs changed from nitrate (NO3-, 64-100%) to dissolved organic N (DON, 52-77%) from the dry season to the wet season and the increased DON concentrations showed a positive relationship with the planted proportions of vegetable production systems. The NO3- concentrations of groundwaters ranged from 10.6 to 121.4mg NL-1, which were over the limit for drinking water by the World Health Organization. Isotopic analysis indicated that most NO3- originated from the microbiological conversion via nitrification, whereas the deletion of denitrification was insignificant in this area. The results of the stable isotope analysis in R mixing model showed the contributions of potential NO3- sources which were in order of manure fertilizers (20.6-69.0%) > soil organic matter (19.5-53.2%) > chemical fertilizers (5.5-34.3%) > atmospheric deposition (1.3-18.8%). This study suggests that the management of crop productions and reasonable manure fertilizer application should be implemented to protect the quality of aquatic systems in the JZB area.
资助项目	National Key Basic Research Program of China (973 Program)[2015CB452901]
WOS关键词	SURFACE RUNOFF ; JIAOZHOU BAY ; LAND-USE ; NITRATE SOURCE ; LOSSES ; SOIL ; DENITRIFICATION ; GROUNDWATER ; OXYGEN ; CARBON
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000477958300052
资助机构	National Key Basic Research Program of China (973 Program)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/58314]
专题	中国科学院地理科学与资源研究所
通讯作者	Yan, Weijin
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Yanqiang,Yan, Weijin,Wang, Fang,et al. Nitrogen pollution and sources in an aquatic system at an agricultural coastal area of Eastern China based on a dual-isotope approach[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2019,26(23):23807-23823.
APA	Li, Yanqiang,Yan, Weijin,Wang, Fang,Lv, Shucong,Li, Qingqian,&Yu, Qibiao.(2019).Nitrogen pollution and sources in an aquatic system at an agricultural coastal area of Eastern China based on a dual-isotope approach.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,26(23),23807-23823.
MLA	Li, Yanqiang,et al."Nitrogen pollution and sources in an aquatic system at an agricultural coastal area of Eastern China based on a dual-isotope approach".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 26.23(2019):23807-23823.