IGSNRR OpenIR
Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China
Li, Tong1; Zhang, Haicheng2; Wang, Xiaoyuan1; Cheng, Shulan3; Fang, Huajun4; Liu, Gang1; Yuan, Wenping5,6
2019-08-02
Source PublicationECOLOGICAL PROCESSES
Volume8Pages:10
Corresponding AuthorYuan, Wenping(yuanwpcn@126.com)
AbstractBackgroundAlthough 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.
KeywordSoil erosion Soil organic carbon Soil respiration Sloping farmland
DOI10.1186/s13717-019-0184-6
WOS KeywordBLACK SOIL ; TEMPERATURE SENSITIVITY ; ERODING HILLSLOPE ; LOESS PLATEAU ; DEPOSITION ; REDISTRIBUTION ; REGION ; MATTER ; RATES ; SEQUESTRATION
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEcology ; Environmental Sciences
WOS IDWOS:000478659200001
PublisherSPRINGEROPEN
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/58152
Collection中国科学院地理科学与资源研究所
Corresponding AuthorYuan, Wenping
Affiliation1.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
Recommended Citation
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.
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