Source identification and budget evaluation of eroded organic carbon in an intensive agricultural catchment

doi:10.1016/j.agee.2017.07.011

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	Source identification and budget evaluation of eroded organic carbon in an intensive agricultural catchment
	Fang, NF (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.; Tong, Lisha 2; Fang, Nufang 1,5; Wang, Yixia 4,5; Shi, Zhihua 4,5
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2017
卷号	247 页码:290-297
关键词	Soil Erosion Check Dam Sediment Sources Soil Organic Carbon Stable Carbon Isotope
ISSN号	0167-8809
DOI	10.1016/j.agee.2017.07.011
文献子类	Article
英文摘要	Soil 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.
学科主题	Agriculture ; Environmental Sciences & Ecology
URL标识	查看原文
出版地	AMSTERDAM
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000408597800032
资助机构	National 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] ; National 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]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7930]
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Fang, NF (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
作者单位	1.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.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Minist Water Resources, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 5.Chinese Acad Sci, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Fang, NF ,Tong, Lisha,Fang, Nufang,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	Fang, NF ,Tong, Lisha,Fang, Nufang,Wang, Yixia,&Shi, Zhihua.(2017).Source identification and budget evaluation of eroded organic carbon in an intensive agricultural catchment.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,247,290-297.
MLA	Fang, NF ,et al."Source identification and budget evaluation of eroded organic carbon in an intensive agricultural catchment".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 247(2017):290-297.