Mineral N stock and nitrate accumulation in the 50 to 200 m profile on the Loess Plateau
文献类型：期刊论文
| 作者 | Jia, Xiaoxu4,5,6; Zhu, Yuanjun6; Huang, Laiming4,5,6; Wei, Xiaorong6; Fang, Yunting2; Wu, Lianhai3; Binley, Andrew1; Shao, Mingan4,5,6 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2018-08-15 |
| 卷号 | 633页码:999-1006 |
| 关键词 | Nitrate Ammonium Nitrate accumulation Critical zone The Loess Plateau |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2018.03.249 |
| 通讯作者 | Zhu, Yuanjun(zhuyj@nwsuaf.edu.cn) ; Shao, Mingan(shaoma@igsnrr.ac.cn) |
| 英文摘要 | Nitrogen (N) stored in deep profiles is important in assessing regional and/or global N stocks and nitrate leaching risk to groundwater. The Chinese Loess Plateau, which is characterized by significantly thick loess deposits, potentially stores immense stocks of mineral N, posing future threats to groundwater quality. In order to determine the vertical distributions of nitrate and ammonium content in the region, as well as to characterize the potential accumulation of nitrate in the deep loess profile, we study loess samples collected at five sites (Yangling, Changwu, Fuxian, An'sai and Shenmu) through a 50 to 200 m loess profile. The estimated storage of mineral N varied significantly among the five sites, ranging from 0.46 to 2.43 x 10(4) kg N ha(-1). Ammonium exhibited fluctuations and dominated mineral N stocks within the whole profile at the sites, except for the upper 20-30 m at Yangling and Changwu. Measured nitrate content in the entire profile at Fuxian, An'sai and Shenmu is low, but significant accumulations were observed to 30-50 m depth at the other two sites. Analysis of delta N-15 and delta O-18 of nitrate indicates different causes for accumulated nitrate at these two sites. Mineralization and nitrification of manure and organic N respectively contribute nitrate to the 0-12 and 12-30 m profile at Changwu; while nitrification of NH4+ fertilizer, NO3- fertilizer and nitrification of organic N control the nitrate distribution in the 0-3, 3-7 and 7-10 m layer at Yangling, respectively. Furthermore, our analysis illustrates the low denitrification potential in the lower part of the vadose zone. The accumulated nitrate introduced by human activities is thus mainly distributed in the upper vadose zone (above 30 m), indicating, currently, a low nitrate leaching risk to groundwater due to a high storage capacity of the thick vadose zone in the region. (C) 2018 Published by Elsevier B.V. |
| WOS关键词 | NORTH CHINA PLAIN ; ISOTOPE FRACTIONATION ; GLOBAL PATTERNS ; SOIL PROFILES ; VADOSE ZONE ; NITROGEN ; WATER ; GROUNDWATER ; DESERT ; CONTAMINATION |
| 资助项目 | National Natural Science Foundation of China[41571130081] ; NERC Newton Fund through the China-UK collaborative research on critical zone science[NE/N007433/1] ; NERC Newton Fund through the China-UK collaborative research on critical zone science[NE/N007409/1] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017076] ; Youth Innovation Research Team Project[LENOM2016Q0001] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000432475300096 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Natural Science Foundation of China ; NERC Newton Fund through the China-UK collaborative research on critical zone science ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Research Team Project |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/54766]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhu, Yuanjun; Shao, Mingan |
| 作者单位 | 1.Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England 2.Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, Shenyang 110016, Liaoning, Peoples R China 3.Rothamsted Res, Okehampton EX20 2SB, Devon, England 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 6.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Xiaoxu,Zhu, Yuanjun,Huang, Laiming,et al. Mineral N stock and nitrate accumulation in the 50 to 200 m profile on the Loess Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,633:999-1006. |
| APA | Jia, Xiaoxu.,Zhu, Yuanjun.,Huang, Laiming.,Wei, Xiaorong.,Fang, Yunting.,...&Shao, Mingan.(2018).Mineral N stock and nitrate accumulation in the 50 to 200 m profile on the Loess Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,633,999-1006. |
| MLA | Jia, Xiaoxu,et al."Mineral N stock and nitrate accumulation in the 50 to 200 m profile on the Loess Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 633(2018):999-1006. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。