Nitrogen pollution and sources in an aquatic system at an agricultural coastal area of Eastern China based on a dual-isotope approach
文献类型：期刊论文
| 作者 | Li, Yanqiang1,2; Yan, Weijin1; Wang, Fang1; Lv, Shucong1,2; Li, Qingqian1,2; Yu, Qibiao1,2 |
| 刊名 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
 |
| 出版日期 | 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. |
| WOS关键词 | SURFACE RUNOFF ; JIAOZHOU BAY ; LAND-USE ; NITRATE SOURCE ; LOSSES ; SOIL ; DENITRIFICATION ; GROUNDWATER ; OXYGEN ; CARBON |
| 资助项目 | National Key Basic Research Program of China (973 Program)[2015CB452901] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000477958300052 |
| 出版者 | SPRINGER HEIDELBERG |
| 资助机构 | National Key Basic Research Program of China (973 Program) |
| 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. |
入库方式： OAI收割
来源：地理科学与资源研究所
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