Dissolved organic carbon loss fluxes through runoff and sediment on sloping upland of purple soil in the Sichuan Basin
文献类型：期刊论文
| 作者 | Hua, Keke1,2; Zhu, Bo1 ; Wang, Xiaoguo1
|
| 刊名 | NUTRIENT CYCLING IN AGROECOSYSTEMS
 |
| 出版日期 | 2014-03-01 |
| 卷号 | 98期号:2页码:125-135 |
| 关键词 | Sloping upland DOC loss Overland flow Interflow Sediment |
| ISSN号 | 1385-1314 |
| 通讯作者 | Zhu, Bo |
| 英文摘要 | Runoff is a major driver for dissolved organic carbon (DOC) diffusing into aquatic ecosystems. Transport of DOC in runoff is important in the C cycle of soils in an agricultural ecosystem. This study provides a combined dataset on DOC loss pathways and fluxes from sloping upland in the purple soil area of southwestern China. A free-drain lysimeter experiment was conducted to quantify DOC loss through overland flow (2010-2012), interflow (2010-2012) and sediment (2011-2012). Average annual cumulative discharges of overland and interflow were 58.3 +/- A 3.1 and 289.4 +/- A 5.4 mm, accounting for 6.8 and 33.8 % of the totals during the entire rainy season, respectively. Average annual cumulative sediment loss flux was 183.5 +/- A 14.6 g m(-2). Average DOC concentrations in overland flow and interflow were 3.44 +/- A 0.36 and 3.04 +/- A 0.24 mg L-1, respectively. Average DOC content in sediment was 73.76 +/- A 4.09 mg kg(-1). The relationship between DOC concentration and discharge in overland flow events could be described by a significant exponential decaying function (R = 0.53, P = 0.027). Average annual DOC loss fluxes through overland flow, interflow and sediment were 163.6 +/- A 28.5, 865.5 +/- A 82.5 and 9.4 +/- A 1.5 mg m(-2), respectively, and total DOC loss was 1,038.5 +/- A 112.5 mg m(-2). The results suggest that interflow is the major driver of DOC leaching loss on sloping upland. It is shown that interflow is fundamentally important for reducing DOC loss on sloping croplands in the Sichuan Basin and possibly beyond. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Soil Science |
| 研究领域[WOS] | Agriculture |
| 关键词[WOS] | RAINFALL INTENSITY ; CHINA ; PARTICULATE ; CATCHMENTS ; TRANSPORT ; DYNAMICS ; CROPLAND ; SYSTEMS ; STREAMS ; SURFACE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000332583100002 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/9957]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Anhui Acad Agr Sci, Soil & Fertilizer Res Inst, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hua, Keke,Zhu, Bo,Wang, Xiaoguo. Dissolved organic carbon loss fluxes through runoff and sediment on sloping upland of purple soil in the Sichuan Basin[J]. NUTRIENT CYCLING IN AGROECOSYSTEMS,2014,98(2):125-135. |
| APA | Hua, Keke,Zhu, Bo,&Wang, Xiaoguo.(2014).Dissolved organic carbon loss fluxes through runoff and sediment on sloping upland of purple soil in the Sichuan Basin.NUTRIENT CYCLING IN AGROECOSYSTEMS,98(2),125-135. |
| MLA | Hua, Keke,et al."Dissolved organic carbon loss fluxes through runoff and sediment on sloping upland of purple soil in the Sichuan Basin".NUTRIENT CYCLING IN AGROECOSYSTEMS 98.2(2014):125-135. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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