The immediate effects of downslope cornstalk mulch (DCM) on sediment yield, runoff and runoff-associated dissolved carbon loss in a representative hillslope, Southwestern China
文献类型：期刊论文
| 作者 | Li, Tianyang1,2,3; Li, Siyue2 ; Liang, Chuan3
|
| 刊名 | CATENA
 |
| 出版日期 | 2019-04-01 |
| 卷号 | 175页码:9-17 |
| 关键词 | Steep slope Rainfall simulation Dissolved organic carbon Soil erosion Stalk mulch |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2018.12.006 |
| 通讯作者 | Li, Siyue(syli2006@163.com) |
| 英文摘要 | Dissolved carbon plays a pivotal role in carbon cycles and potentially affects ecological processes of water body. While stalk mulch can regulate soil and water losses, its effects on the export of dissolved carbon from soils are poorly understood. The main objective of this study was to determine the effects of rainfall intensity and downslope cornstalk mulch (the lengths of cornstalks along the slope, DCM) on runoff, sediment yield and dissolved carbon losses, including dissolved inorganic carbon (DIC), dissolved organic carbon (DOC) and dissolved total carbon (DTC). A series of field rainfall simulations were conducted on the steep fallow land (20 degrees) locating in a representative hillslope of southwestern China that experiences severe soil erosion, and data for runoff, sediment and dissolved carbon loss rates were obtained from triplet parallel plots (1.5 m long and 1 m wide for each one) using 60 min rainfall simulations at 30 and 90 mm h(-1) intensities on bare soils and 90 mm h(-1) intensity on soils with DCM (air-dried whole plants, 60% coverage and weight 1.65 kg), respectively. Rainfall intensity showed positive effects on runoff generation, sediment yield and loss rates of DIC, DOC and DTC. The plots with immediate DCM had no difference in runoff generation, but were 71.1% lower in sediment yield and 53.9% higher in DOC loss rate relative to the bare plots. The contribution of DIC to DTC increased from 35.9% to 59.6% with the increasing rainfall intensity. Cornstalk mulching appeared efficient in reducing sediment yield, but its adoption is likely to dramatically enhance DOC exports from soils with concerns for the quality of inland waters. Further research studies are required to discriminate between soil and cornstalk mulch contribution to DOC exports by overland flow. |
| 资助项目 | the Hundred-Talent Program of the Chinese Academy of Sciences, China[R53A362Z10] ; National Natural Science Foundation of China (NSFC)[31670473] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000459358500002 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/7441]  |
| 专题 | 生态水文研究中心 |
| 通讯作者 | Li, Siyue |
| 作者单位 | 1.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Res Ctr Ecohydrol, Chongqing 400714, Peoples R China 3.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Coll Water Resource & Hydropower, Chengdu 610065, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Tianyang,Li, Siyue,Liang, Chuan. The immediate effects of downslope cornstalk mulch (DCM) on sediment yield, runoff and runoff-associated dissolved carbon loss in a representative hillslope, Southwestern China[J]. CATENA,2019,175:9-17. |
| APA | Li, Tianyang,Li, Siyue,&Liang, Chuan.(2019).The immediate effects of downslope cornstalk mulch (DCM) on sediment yield, runoff and runoff-associated dissolved carbon loss in a representative hillslope, Southwestern China.CATENA,175,9-17. |
| MLA | Li, Tianyang,et al."The immediate effects of downslope cornstalk mulch (DCM) on sediment yield, runoff and runoff-associated dissolved carbon loss in a representative hillslope, Southwestern China".CATENA 175(2019):9-17. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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