Inventory of apparent nitrogen and phosphorus balance and risk of potential pollution in typical sloping cropland of purple soil in China - A case study in the Three Gorges Reservoir region
文献类型：期刊论文
| 作者 | Ouyang, Wenjuan ; Li, Zhe; Liu, Jing; Guo, Jinsong; Fang, Fang; Xiao, Yan; Lu, Lunhui
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| 刊名 | ECOLOGICAL ENGINEERING
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| 出版日期 | 2017 |
| 卷号 | 106页码:620-628 |
| ISSN号 | 0925-8574 |
| DOI | 10.1016/j.ecoleng.2017.06.044 |
| 通讯作者 | Guo, JS (reprint author), 266 Fangzheng Ave,Shuitu High Tech Pk, Chongqing 400714, Peoples R China. |
| 英文摘要 | Agricultural non-point source pollution of nitrogen (N) and phosphorus (P) exerts a key influence on aquatic environment safety. Purple soil and sloping cropland make up the highest proportion of all soil types and land-use pattern in the up and middle reaches of Yangtze River. Therefore, a study on nutrients balance for risk assessment in sloping cropland of purple soil will contribute to the understanding of the causes of eutrophication in aquatic environment in China. The Organization for Economic Cooperation and Development (OECD) have developed the soil surface nitrogen balance indicator to estimate potential N pollution through measuring the difference between agricultural inputs and outputs. Based on this indicator, we established a framework, a methodology, and a database for calculating the N and P balance for typical sloping cropland of purple soil in TGR region, and evaluated the impact of nutrients balance on agricultural production and environment. For the basic watershed of Xinzheng unit, which mainly consists of sloping cropland of purple soil, N and P inputs were 755 and 107 kg ha(-1) a(-1), with 68.4% of N and 56.1% of P inputs originating from chemical fertilizer. The N and P outputs were 482 and 60 kg ha(-1) a(-1); the N in crops and P in straw accounted for 23.5% and 45.6% of total outputs, respectively. The N and P surplus intensities were 273 and 47 kg ha(-1) a(-1), much higher than the respective risk thresholds of 180 kg ha(-1) a(-1) and 35 kg ha(-1) a(-1), indicating a risk of N and P potential pollution in aquatic environments via cropland discharge. It is essential to utilize proper fertilization methods and improve fertilizer use efficiency in sloping cropland of purple soil in China. (C) 2017 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000405512600065 |
| 源URL | [http://172.16.51.4:88/handle/2HOD01W0/162]  |
| 专题 | 水质生物转化研究中心 |
| 作者单位 | (1) Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, CAS Key Lab Reservoir Environm, 266 Fangzheng Ave,Shuitu High Tech Pk, Chongqing 400714, Peoples R China; (2) Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm MO, 83 Shabei St, Chongqing 400045, Peoples R China; (3) Div Resources & Environm Protect Audit Hunan Audi, 6 Jiayu Rd, Changsha 410001, Hunan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ouyang, Wenjuan,Li, Zhe,Liu, Jing,et al. Inventory of apparent nitrogen and phosphorus balance and risk of potential pollution in typical sloping cropland of purple soil in China - A case study in the Three Gorges Reservoir region[J]. ECOLOGICAL ENGINEERING,2017,106:620-628. |
| APA | Ouyang, Wenjuan.,Li, Zhe.,Liu, Jing.,Guo, Jinsong.,Fang, Fang.,...&Lu, Lunhui.(2017).Inventory of apparent nitrogen and phosphorus balance and risk of potential pollution in typical sloping cropland of purple soil in China - A case study in the Three Gorges Reservoir region.ECOLOGICAL ENGINEERING,106,620-628. |
| MLA | Ouyang, Wenjuan,et al."Inventory of apparent nitrogen and phosphorus balance and risk of potential pollution in typical sloping cropland of purple soil in China - A case study in the Three Gorges Reservoir region".ECOLOGICAL ENGINEERING 106(2017):620-628. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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