Effects of human activities on soil organic carbon redistribution at an agricultural watershed scale on the Chinese Loess Plateau
文献类型：期刊论文
| 作者 | Zeng, Yi2,3; Fang, Nufang1,3; Shi, Zhihua1,2,4 |
| 刊名 | AGRICULTURE ECOSYSTEMS & ENVIRONMENT
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 303页码:11 |
| 关键词 | Soil erosion Human activities Land use changes Check dam Soil organic carbon Loess Plateau |
| ISSN号 | 0167-8809 |
| DOI | 10.1016/j.agee.2020.107112 |
| 通讯作者 | Fang, Nufang(fnf@ms.iswc.ac.cn) ; Shi, Zhihua(pengshi@mail.hzau.edu.cn) |
| 英文摘要 | Human activity is thought to perturb the dynamic change of organic carbon (OC), but its impact on the transportation and redistribution of erosion-induced OC is still poorly understood. Here, we use mull-source field sampling data and long-term hydrological observation data to clarify the transportation and redistribution of OC in an agricultural watershed on the Loess Plateau. The endmember mixing model based on the radiocarbon isotopes (C-14) and a budget equation were used to assess the composition and budget of erosion-induced OC in a 187 km(2) watershed. The results showed that compared with the period of agricultural activities (1960 - 1969), soil conservation activities in 1970 - 1999 and 2000 - 2019 reduced soil erosion by 31.5 % and 75.4 %, respectively. Additionally, land use changes significantly reduced the mobilized OC, from 14,370 +/- 1966 (1960 -1969) to 3311 +/- 431 Mg C yr(-1) (2000 - 2019). Check dam construction led to the mobilized OC was effectively buried at a rate of 2125 +/- 478 and 1420 +/- 282 Mg C yr(-1) in periods of 1970-1999 and 2000-2019, respectively. Further radiocarbon isotopes analysis shows that the land use changes and check dam construction effectively reduced the output of ancient petrogenic organic carbon (OCpetro) and young biospheric organic carbon (OCbio) from the watershed, which has a positive impact on the regulation of atmospheric CO2 level. Our results emphasize the positive effects of soil conservation activities on terrestrial carbon sequestration, which are of great significance to clarify the effects of soil erosion on the carbon cycle. |
| WOS关键词 | LAND-USE CHANGE ; CHECK-DAMS ; EROSION PROCESSES ; SEDIMENT YIELD ; SEQUESTRATION ; DEPOSITION ; BURIAL ; VEGETATION ; TRANSPORT ; NITROGEN |
| 资助项目 | National Natural Science Foundation of China[41525003] ; National Natural Science Foundation of China[41671282] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 40020302] |
| WOS研究方向 | Agriculture ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000566695800001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/157938]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Fang, Nufang; Shi, Zhihua |
| 作者单位 | 1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 2.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China 3.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, Yi,Fang, Nufang,Shi, Zhihua. Effects of human activities on soil organic carbon redistribution at an agricultural watershed scale on the Chinese Loess Plateau[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2020,303:11. |
| APA | Zeng, Yi,Fang, Nufang,&Shi, Zhihua.(2020).Effects of human activities on soil organic carbon redistribution at an agricultural watershed scale on the Chinese Loess Plateau.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,303,11. |
| MLA | Zeng, Yi,et al."Effects of human activities on soil organic carbon redistribution at an agricultural watershed scale on the Chinese Loess Plateau".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 303(2020):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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