Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China
文献类型：期刊论文
| 作者 | Li, Tong1; Zhang, Haicheng2; Wang, Xiaoyuan1; Cheng, Shulan3; Fang, Huajun4 ; Liu, Gang1; Yuan, Wenping5,6
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| 刊名 | ECOLOGICAL PROCESSES
 |
| 出版日期 | 2019-08-02 |
| 卷号 | 8页码:10 |
| 关键词 | Soil erosion Soil organic carbon Soil respiration Sloping farmland |
| DOI | 10.1186/s13717-019-0184-6 |
| 通讯作者 | Yuan, Wenping(yuanwpcn@126.com) |
| 英文摘要 | BackgroundAlthough soil erosion plays a key role in the carbon cycle, a holistic and mechanistic understanding of the soil erosion process within the cycle is still lacking. The aim of this study was therefore to improve our mechanistic understanding of soil organic carbon (SOC) and soil respiration dynamics through an experiment conducted in an eroding black soil farmland landscape in Northeast China.ResultsThe depositional profiles store 5.9 times more SOC than the eroding profiles and 3.3 times more SOC than the non-eroding profiles. A linear correlation between the SOC and Cs-137 (Caesium-137) was observed in our study, suggesting that the SOC decreased with increased soil erosion. Furthermore, the fractions of intermediate C and the microaggregate C were lowest at the eroding position and highest at the depositional position. In the depositional topsoil, the input of labile materials plays a promotional role in soil respiration. Conversely, in the subsoil (i.e., below 10cm), the potential mineralization rates were lowest at the depositional position-due to effective stabilization by physical protection within soil microaggregates. The field results of soil surface respiration also suggest that the depositional topsoil SOC is prone to be mineralized and that SOC at this depositional context is stabilized at subsoil depth. In addition, the high water contents at the depositional position can limit the decomposition rates and stabilize the SOC at the same time.ConclusionsThe findings from this study support that a majority of the SOC at footslope is stored within most of the soil profile (i.e., below 10cm) and submitted to long-term stabilization, and meanwhile support that the depositional profile emits more CO2 than the summit due to its high amount and quality of SOC. |
| WOS关键词 | BLACK SOIL ; TEMPERATURE SENSITIVITY ; ERODING HILLSLOPE ; LOESS PLATEAU ; DEPOSITION ; REDISTRIBUTION ; REGION ; MATTER ; RATES ; SEQUESTRATION |
| 资助项目 | National Key Research and Development Program[2016YFA0602701] ; National Natural Science Foundation of China[31570468] ; Changjiang Young Scholars Programme of China[Q2016161] ; National Youth Top-Notch Talent Support Program ; Fok Ying Tung Education Foundation[151015] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | SPRINGEROPEN |
| WOS记录号 | WOS:000478659200001 |
| 资助机构 | National Key Research and Development Program ; National Natural Science Foundation of China ; Changjiang Young Scholars Programme of China ; National Youth Top-Notch Talent Support Program ; Fok Ying Tung Education Foundation |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/58151]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yuan, Wenping |
| 作者单位 | 1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 2.UVSQ Saclay, CNRS, IPSL LSCECEA, Lab Sci Climat & Environm, Gif Sur Yvette, France 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosystem Network Observat & Modeling, Beijing 100101, Peoples R China 5.Sun Yat Sen Univ, Sch Atmospher Sci, Guangdong Prov Key Lab Climate Change & Nat Disas, Zhuhai 519082, Peoples R China 6.Southern Marine Sci & Engn Guangdong Lab, Zhuhai 519082, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Tong,Zhang, Haicheng,Wang, Xiaoyuan,et al. Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China[J]. ECOLOGICAL PROCESSES,2019,8:10. |
| APA | Li, Tong.,Zhang, Haicheng.,Wang, Xiaoyuan.,Cheng, Shulan.,Fang, Huajun.,...&Yuan, Wenping.(2019).Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China.ECOLOGICAL PROCESSES,8,10. |
| MLA | Li, Tong,et al."Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China".ECOLOGICAL PROCESSES 8(2019):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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