ISWC OpenIR  > 水保所科研产出--SCI  > 2017--SCI
Source identification and budget evaluation of eroded organic carbon in an intensive agricultural catchment
Wang, Yixia2,3; Fang, Nufang1,2; Tong, Lisha5; Shi, Zhihua2,3; Fang, NF (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2017
Source PublicationAGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN0167-8809
description.correspondentemailwyixia@126.com ; fnf@ms.iswc.ac.cn ; tongls@webmail.hzau.edu.cn ; shizhihua70@gmail.com
Volume247Pages:290-297
AbstractSoil erosion affects the redistribution of soil and associated soil organic carbon (SOC) from different landforms, and it has significant implications regarding the fate of eroded SOC and terrestrial carbon sequestration. Despite the importance of soil erosion, few studies have evaluated the sources and budget of eroded SOC in the Loess Plateau region, which suffers from severe soil erosion. Based on an 11.3 m check dam sediment profile, we used the Cs-137 activity and extreme rainfall events as dating methods to date sediment sequences. In addition, the natural abundance levels of the stable carbon isotope (delta C-13) of bulk organic matter and a two-end-member mixing model were used to discriminate the sources of eroded SOC from different siltation stages retained by the check dam in an intensive agricultural catchment of the Loess Plateau, China. The eroded SOC captured by the check dam was compared to potential source materials from different landscape units, which included sloping cropland and gully surface soils (0-5 cm). The results showed that the check dam intercepted 98.5 Gg of eroded soil and 172.6 Mg of SOC. The eroded SOC was primarily sourced from sloping cropland, which contributed to 81.3% of the total SOC retained by the check dam, whereas the gully soils contributed to 18.7% during the entire siltation stage. Additionally, the contribution of sloping cropland to eroded SOC increased from 1960 to 1990 as a result of rainfall and anthropogenic activities. A total of 89.7 Mg SOC was lost during soil erosion processes at a rate of 0.17 Mg ha(-1) yr(-1) and accounted for approximately 30% of the total eroded SOC exported from the eroding areas. Our results indicate that the soil erosion process has been an important net source of SOC in the study catchment. The check dam served as a carbon storage and sequestration structure for the hilly loess region due to its beneficial conditions for carbon sequestration over broad temporal and spatial distributions.
KeywordSoil Erosion Check Dam Sediment Sources Soil Organic Carbon Stable Carbon Isotope
Subject AreaAgriculture ; Environmental Sciences & Ecology
DOI10.1016/j.agee.2017.07.011
URL查看原文
Indexed BySCI
Publication PlaceAMSTERDAM
Language英语
WOS IDWOS:000408597800032
PublisherELSEVIER SCIENCE BV
Funding OrganizationNational Natural Science Foundation of China [41671282, 41525003]; National Key Research and Development Program of China [2016YFC0402401] ; National Natural Science Foundation of China [41671282, 41525003]; National Key Research and Development Program of China [2016YFC0402401]
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/7930
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorFang, NF (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.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
2.Chinese Acad Sci, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
3.Minist Water Resources, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yixia,Fang, Nufang,Tong, Lisha,et al. Source identification and budget evaluation of eroded organic carbon in an intensive agricultural catchment[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2017,247:290-297.
APA Wang, Yixia,Fang, Nufang,Tong, Lisha,Shi, Zhihua,&Fang, NF .(2017).Source identification and budget evaluation of eroded organic carbon in an intensive agricultural catchment.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,247,290-297.
MLA Wang, Yixia,et al."Source identification and budget evaluation of eroded organic carbon in an intensive agricultural catchment".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 247(2017):290-297.
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