Dynamic changes of nitrogen and phosphorus losses in ephemeral runoff processes by typical storm events in Sichuan Basin, Southwest China
文献类型：期刊论文
| 作者 | Yang, Jin-Ling1; Zhang, Gan-Lin1; Shi, Xue-Zheng1; Wang, Hong-Jie1; Cao, Zhi-Hong1; Ritsema, Coen J.2 |
| 刊名 | SOIL & TILLAGE RESEARCH
 |
| 出版日期 | 2009-11-01 |
| 卷号 | 105期号:2页码:292-299 |
| ISSN号 | 0167-1987 |
| 关键词 | Nitrogen loss Phosphorus loss Erosion Ephemeral runoff process Rainfall |
| DOI | 10.1016/j.still.2009.04.003 |
| 通讯作者 | Zhang, Gan-Lin(glzhang@issas.ac.cn) |
| 英文摘要 | This study was carried out in the Xujiawan watershed in Sichuan Province, China. The area is characterized by easy weathering of bedrock (sedimentary sandstone and shale) and vulnerability to erosion due to coarse soil texture and weak soil structure. The objective of this study was to understand the dynamics of nitrogen (N) and phosphorus (P) losses during typical storm events. The results showed that runoff generation was sudden and ephemeral, giving rise to flash floods with sharp, narrow hydrographs and short time lags in this type of agricultural ecosystems. The time lag effect of runoff formation depended on soil conditions before storm events. Suspended solids (SS) concentration peaks occurred at the beginning of the storm flow and decreased as rainfall progressed. Meanwhile, SS losses increased at the beginning of runoff flow, then decreased due to flow volume change. Concentrations of NO(3)(-)-N were four times higher than NH(4)(+)-N in runoff. NO(3)(-)-N concentrations first decreased as runoff volume increased until reaching relatively low concentrations, then increased again as runoff volume decreased. Both NH(4)(+)-N and dissolved phosphorus (DP) in runoff remained at low concentrations with a small magnitude of variation. Suspended particulate nitrogen (SN) was the dominant N form. Losses of NO(3)(-)-N were higher than NH(4)(+)-N in the dissolved nitrogen (DN). Suspended particulate nitrogen losses were several times higher than DN in the early period of runoff formation, but the ratio of SN/DN decreased gradually as rainfall progressed, and by the end of the storm event the rate was lower than 1, indicating DN took the main form after the early physical flush. In the early period of storm events, suspended particulate phosphorus (SP)/DP was above 70 and decreased as rainfall progressed, but remained higher than 1, which showed that SP was the main form of P loss. The transport of N, and particularly P, was intimately linked to sediment in the runoff, indicating an obvious soil erosion-associated nutrient transport, especially in relation to P loss. (C) 2009 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | CLAY LOAM SOIL ; SURFACE RUNOFF ; BIOAVAILABLE PHOSPHORUS ; SUBTROPICAL CHINA ; LAND-USE ; SEDIMENT ; WATERS ; EUTROPHICATION ; NUTRIENTS ; TRANSPORT |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000272062400016 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558796 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhang, Gan-Lin |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Wageningen Univ Alterra, Soil Sci Ctr, NL-6708 PB Wageningen, Netherlands |
| 推荐引用方式 GB/T 7714 | Yang, Jin-Ling,Zhang, Gan-Lin,Shi, Xue-Zheng,et al. Dynamic changes of nitrogen and phosphorus losses in ephemeral runoff processes by typical storm events in Sichuan Basin, Southwest China[J]. SOIL & TILLAGE RESEARCH,2009,105(2):292-299. |
| APA | Yang, Jin-Ling,Zhang, Gan-Lin,Shi, Xue-Zheng,Wang, Hong-Jie,Cao, Zhi-Hong,&Ritsema, Coen J..(2009).Dynamic changes of nitrogen and phosphorus losses in ephemeral runoff processes by typical storm events in Sichuan Basin, Southwest China.SOIL & TILLAGE RESEARCH,105(2),292-299. |
| MLA | Yang, Jin-Ling,et al."Dynamic changes of nitrogen and phosphorus losses in ephemeral runoff processes by typical storm events in Sichuan Basin, Southwest China".SOIL & TILLAGE RESEARCH 105.2(2009):292-299. |
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来源：南京土壤研究所
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