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, Xiaoqian3,4; Jia, Xiaoxu3,4; Yang, Xiaofan2; Wang, Jiao3; Wei, Xiaorong1; Wu, Lianhai5; Shao, Mingan3,4 |
刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY |
出版日期 | 2022-06-22 |
页码 | 11 |
ISSN号 | 0013-936X |
关键词 | nitrate deep vadose zone groundwater land-use change nitrate isotopes |
DOI | 10.1021/acs.est.1c06289 |
通讯作者 | Jia, Xiaoxu(jiaxx@igsnrr.ac.cn) ; Yang, Xiaofan(xfyang@bnu.edu.cn) |
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 | 中国科学院地理科学与资源研究所 |
通讯作者 | Jia, Xiaoxu; Yang, Xiaofan |
作者单位 | 1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 5.Rothamsted Res, Okehampton EX20 2SB, Devon, England |
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,2022:11. |
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,11. |
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 (2022):11. |
入库方式: OAI收割
来源:地理科学与资源研究所
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