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Effects of erosion on the microaggregate organic carbon dynamics in a small catchment of the Loess Plateau, China

文献类型：期刊论文

作者Wang, Yixia1,2; Fang, Nufang1,2; Zhang, Fengbao1,2; Wang, Ling1,2; Wu, Gaolin1,2; Yang, Mingyi1,2; Yang, MY (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Yang, MY (reprint author), Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China.
刊名SOIL & TILLAGE RESEARCH
出版日期2017
卷号174页码:205-213
关键词Check Dam Sediment Soil Erosion Microaggregate Organic Carbon
ISSN号0167-1987
DOI10.1016/j.still.2017.08.001
文献子类Article
英文摘要Soil erosion significantly affects the dynamics of the terrestrial carbon (C) cycle. Erosion removes C-rich topsoil and deposits it in lower-elevation areas and exposes deeper C-poor horizons at the surface. However, the mechanisms responsible for the mobilization and deposition of microaggregate soil organic carbon (SOC) due to soil erosion at the catchment scale remain unclear. The main objective of this study is to illustrate the effects of different erosion processes on the distribution and deposition of microaggregate SOC. The activity of Cs-137 and extreme rainfall events were used as dating methods Based on the microaggregate size distribution and the K means clustering approach, 75 flood couplets were identified in an 11.3-m sediment deposit profile of the check dam in the Nianyangou catchment and classified into three couplet types. In each flood couplet, the SOC concentrations and amounts in three microaggregate fractions (250-50, 50-20 and < 20 pm) were quantified. The following results were obtained. (1) 137Cs activity and a record of extreme rainfall events can be used to characterize the sediment deposition process. (2) Sediments with fine microaggregate fractions (Couplet Type I) contained abundant SOC and were mainly associated with low-intensity rainfall conditions, whereas sediments with coarse microaggregate fractions (Couplet Type III) had higher SOC concentrations and were mainly associated with high-intensity rainfall conditions. (3) Couplet Type I sediments were most likely related to sheet and interrill erosion, whereas Couplet Type III sediments were likely associated with rill and gully erosion. Our study contributes to the understanding of the effects of soil erosion on microaggregate SOC dynamics at the catchment scale and further illustrates the carbon sequestration mechanism active in check dams of the Loess Plateau.
学科主题Agriculture
URL标识查看原文
出版地AMSTERDAM
语种英语
WOS记录号WOS:000412265800021
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China [41571130082, 41671281, 41071194]; Major Programs of the Chinese Academy of Sciences [KZZD-EW-04-03] ; National Natural Science Foundation of China [41571130082, 41671281, 41071194]; Major Programs of the Chinese Academy of Sciences [KZZD-EW-04-03] ; National Natural Science Foundation of China [41571130082, 41671281, 41071194]; Major Programs of the Chinese Academy of Sciences [KZZD-EW-04-03] ; National Natural Science Foundation of China [41571130082, 41671281, 41071194]; Major Programs of the Chinese Academy of Sciences [KZZD-EW-04-03]
源URL[http://ir.iswc.ac.cn/handle/361005/7884]  
专题水保所科研产出--SCI_2017--SCI
通讯作者Yang, MY (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Yang, MY (reprint author), Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China.
作者单位1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Yixia,Fang, Nufang,Zhang, Fengbao,et al. Effects of erosion on the microaggregate organic carbon dynamics in a small catchment of the Loess Plateau, China[J]. SOIL & TILLAGE RESEARCH,2017,174:205-213.
APA Wang, Yixia.,Fang, Nufang.,Zhang, Fengbao.,Wang, Ling.,Wu, Gaolin.,...&Yang, MY .(2017).Effects of erosion on the microaggregate organic carbon dynamics in a small catchment of the Loess Plateau, China.SOIL & TILLAGE RESEARCH,174,205-213.
MLA Wang, Yixia,et al."Effects of erosion on the microaggregate organic carbon dynamics in a small catchment of the Loess Plateau, China".SOIL & TILLAGE RESEARCH 174(2017):205-213.

入库方式： OAI收割

来源：水土保持研究所

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