Water environmental pressure assessment in agricultural systems in Central Asia based on an Integrated Excess Nitrogen Load Model
文献类型：期刊论文
| 作者 | Feng, Wei1,2; Lu, Hongwei1; Yao, Tianci1,2; Guan, Yanlong3; Xue, Yuxuan1,2; Yu, Qing1,2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2022-01-10 |
| 卷号 | 803页码:12 |
| 关键词 | Nitrogen excess Environmental pressure assessment Grey water footprint Water pollution level Central Asia |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2021.149912 |
| 通讯作者 | Lu, Hongwei(luhw@igsnrr.ac.cn) |
| 英文摘要 | Agricultural runoff is the main source of water pollution in Central Asia. Excessive nitrogen (N) inputs from over-use of chemical fertilizers are threatening regional water resources. However, the scarcity of quantitative data and simplified empirical models limit the reliability of grey water footprint (GWF), particularly in undeveloped regions. In this study, we developed an Integrated Excess Nitrogen Load Model (IENLM) to calculate excess N load and evaluate its potential water environmental pressure in Central Asia. The model optimized the biological N fixation and atmospheric N deposition modules by involving more environmental variables and human activ-ities. Results showed that N fertilizer application contributed over 60% to total N input and was mainly responsible for 42.9% increase of total GWF from 101.5 to 145.0 billion m(3) during 1992 -2018. Water pollution level (WPL) increased from 0.55 in 1992 to 2.41 in 2018 and the pollution assimilation capacity of water systems has been fully consumed just by N load from agriculture since 2005. GWF intensity and grey water pollution - efficiency types in all Central Asian countries have improved in recent years except for Turkmenistan. N fertilizer application and agricultural economy development were the main driving factors induced N pollution. Results were validated by riverine nitrate concentrations and the estimates from prior studies. In future, combining the N fertilizer reduction with other farm management practices were projected to effectively improve the WPL. The modeling framework is favorable for N pollution research in data-scarce regions and provides a scien-tific basis for decision-making for agriculture and water resource managements. (C) 2021 Elsevier B.V. All rights reserved. |
| WOS关键词 | RIVER-BASIN ; ANTHROPOGENIC NITROGEN ; DECOMPOSITION ANALYSIS ; FERTILIZER APPLICATION ; FOOTPRINT ASSESSMENT ; MICROBIAL BIOMASS ; GLOBAL NITROGEN ; EMISSIONS ; PHOSPHORUS ; FRAMEWORK |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20040302] ; CAS Interdisciplinary Innovation Team[JCTD-2019-04] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000702878700009 |
| 出版者 | ELSEVIER |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS Interdisciplinary Innovation Team |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/166006]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Lu, Hongwei |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, Wei,Lu, Hongwei,Yao, Tianci,et al. Water environmental pressure assessment in agricultural systems in Central Asia based on an Integrated Excess Nitrogen Load Model[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,803:12. |
| APA | Feng, Wei,Lu, Hongwei,Yao, Tianci,Guan, Yanlong,Xue, Yuxuan,&Yu, Qing.(2022).Water environmental pressure assessment in agricultural systems in Central Asia based on an Integrated Excess Nitrogen Load Model.SCIENCE OF THE TOTAL ENVIRONMENT,803,12. |
| MLA | Feng, Wei,et al."Water environmental pressure assessment in agricultural systems in Central Asia based on an Integrated Excess Nitrogen Load Model".SCIENCE OF THE TOTAL ENVIRONMENT 803(2022):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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