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Tracing the Sources and Fate of NO3- in the Vadose Zone - Groundwater System of a Thousand-Year-Cultivated Region

文献类型：期刊论文

作者Niu, Xiaoqian1,5; Jia, Xiaoxu1,5; Yang, Xiaofan3; Wang, Jiao1; Wei, Xiaorong2; Wu, Lianhai4; Shao, Mingan1,5
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期2022-06-22
卷号56页码:9335-9345
ISSN号0013-936X
关键词nitrate deep vadose zone groundwater land-use change nitrate isotopes
DOI10.1021/acs.est.1c06289
英文摘要Excess nitrate (NO3-) loading in terrestrial and aquatic ecosystems can result in critical environmental and health issues. NO3--rich groundwater has been recorded in the Guanzhong Plain in the Yellow River Basin of China for over 1000 years. To assess the sources and fate of NO3- in the vadose zone and groundwater, numerous samples were collected via borehole drilling and field surveys, followed by analysis and stable NO3- isotope quantification. The results demonstrated that the NO3- concentration in 38% of the groundwater samples exceeded the limit set by the World Health Organization. The total NO3- stock in the 0???10 m soil profile of the orchards was 3.7 times higher than that of the croplands, suggesting that the cropland-to-orchard transition aggravated NO3- accumulation in the deep vadose zone. Based on a Bayesian mixing model applied to stable NO3- isotopes (delta N-15 and delta O-18), NO3- accumulation in the vadose zone was predominantly from manure and sewage N (MN, 27-54%), soil N (SN, 0-64%), and chemical N fertilizer (FN, 4-46%). MN was, by far, the greatest contributor to groundwater NO3- (58-82%). The results also indicated that groundwater NO3- was mainly associated with the soil and hydrogeochemical characteristics, whereas no relationship with modern agricultural activities was observed, likely due to the time delay in the thick vadose zone. The estimated residence time of NO3- in the vadose zone varied from decades to centuries; however, NO3- might reach the aquifer in the near future in areas with recent FN loading, especially those under cropland-to-orchard transition or where the vadose zone is relatively thin. This study suggests that future agricultural land-use transitions from croplands to orchards should be promoted with caution in areas with shallow vadose zones and coarse soil texture.
WOS关键词NITRATE CONTAMINATION ; GUANZHONG PLAIN ; UNSATURATED ZONE ; NITROGEN-ISOTOPE ; STABLE-ISOTOPES ; WATER ; ACCUMULATION ; IDENTIFICATION ; VULNERABILITY ; ATTENUATION
资助项目National Natural Science Foundation of China[42022048] ; National Natural Science Foundation of China[41877183] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40020000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23070202] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y2021023] ; UK Natural Environment Research Council/Newton Funds[NE/S009094/1]
WOS研究方向Engineering ; Environmental Sciences & Ecology
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000820618500001
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; UK Natural Environment Research Council/Newton Funds
源URL[http://ir.igsnrr.ac.cn/handle/311030/180764]  
专题黄河三角洲现代农业工程实验室_外文论文
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
3.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China
4.Rothamsted Res, Okehampton EX20 2SB, Devon, England
5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Niu, Xiaoqian,Jia, Xiaoxu,Yang, Xiaofan,et al. Tracing the Sources and Fate of NO3- in the Vadose Zone - Groundwater System of a Thousand-Year-Cultivated Region[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56:9335-9345.
APA Niu, Xiaoqian.,Jia, Xiaoxu.,Yang, Xiaofan.,Wang, Jiao.,Wei, Xiaorong.,...&Shao, Mingan.(2022).Tracing the Sources and Fate of NO3- in the Vadose Zone - Groundwater System of a Thousand-Year-Cultivated Region.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56,9335-9345.
MLA Niu, Xiaoqian,et al."Tracing the Sources and Fate of NO3- in the Vadose Zone - Groundwater System of a Thousand-Year-Cultivated Region".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56(2022):9335-9345.

入库方式： OAI收割

来源：地理科学与资源研究所

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