Nitrogen budget and riverine nitrogen output in a rice paddy dominated agricultural watershed in eastern China
文献类型：期刊论文
| 作者 | Yan, Xiaoyuan1; Cai, Zucong1; Yang, Rong1; Ti, Chaopu1; Xia, Yongqiu1; Li, Feiyue1; Wang, Jianqun2; Ma, Aijun3 |
| 刊名 | BIOGEOCHEMISTRY
 |
| 出版日期 | 2011-11-01 |
| 卷号 | 106期号:3页码:489-501 |
| 关键词 | Eastern China Nitrogen budget Reservoir Riverine discharge Watershed |
| ISSN号 | 0168-2563 |
| DOI | 10.1007/s10533-010-9528-0 |
| 通讯作者 | Yan, Xiaoyuan(yanxy@issas.ac.cn) |
| 英文摘要 | The nitrogen (N) budget calculation approach is a useful means of evaluating the impact of human activity on the N cycle. Field scale N budget calculations may ignore the interactions between landscapes, and regional scale calculations rely on statistical data and indirect parameters. Watershed scale budget calculations allow for a more direct quantification of N inputs and outputs. We conducted N budget calculations for a rice paddy-dominated agricultural watershed in eastern China for 2007-2009, based on intensive monitoring of stream N dynamics, atmospheric deposition, ammonia (NH(3)) volatilization and household interviews about N-related agricultural activities. The results showed that although total N input to the watershed was up to 280 kg N ha(-1) year(-1), riverine discharge was only 4.2 kg N ha(-1) year(-1), accounting for 1.5% of the total N input, and was further reduced to 2.0 kg N ha(-1) year(-1) after reservoir storage and/or denitrification removal. The low riverine N output was because of the characteristics of the rice paddy-dominated landscape, which intercepts run-off and enhances soil denitrification. The watershed actually purified the N in rainwater, as N concentrations in river discharge were much lower than those in rain water. Major N outputs included food/feed export, NH(3) volatilization from chemical fertilizer and manure, and emissions from crop residue burning. Net reactive gaseous emissions (emissions minus deposition) accounted for 5.5% of the total N input, much higher than riverine discharge. Therefore, the agricultural N cycle in such paddy-dominated watersheds impacts the environment mainly through gas exchange rather than water discharge. |
| 收录类别 | SCI |
| WOS关键词 | TAIHU LAKE REGION ; WHEAT ROTATIONS ; EXPORT ; DENITRIFICATION ; BALANCE ; SYSTEMS ; LOSSES ; MANAGEMENT ; POLLUTION ; EMISSION |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000297360300013 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558951 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Yan, Xiaoyuan |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Peoples R China 2.Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Peoples R China 3.Jiangsu Polytech Coll Agr & Forestry, Jurong 212400, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Xiaoyuan,Cai, Zucong,Yang, Rong,et al. Nitrogen budget and riverine nitrogen output in a rice paddy dominated agricultural watershed in eastern China[J]. BIOGEOCHEMISTRY,2011,106(3):489-501. |
| APA | Yan, Xiaoyuan.,Cai, Zucong.,Yang, Rong.,Ti, Chaopu.,Xia, Yongqiu.,...&Ma, Aijun.(2011).Nitrogen budget and riverine nitrogen output in a rice paddy dominated agricultural watershed in eastern China.BIOGEOCHEMISTRY,106(3),489-501. |
| MLA | Yan, Xiaoyuan,et al."Nitrogen budget and riverine nitrogen output in a rice paddy dominated agricultural watershed in eastern China".BIOGEOCHEMISTRY 106.3(2011):489-501. |
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来源：南京土壤研究所
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