Developing equations to explore relationships between aggregate stability and erodibility in Ultisols of subtropical China

doi:10.1016/j.catena.2017.05.032

	Developing equations to explore relationships between aggregate stability and erodibility in Ultisols of subtropical China
	Xiao, Hai 1; Liu, Gang 1,2; Liu, Puling 1,2; Zheng, Fenli 1,2; Zhang, Jiaqiong 1,2; Hu, Feinan 1,2
刊名	CATENA
	2017-10-01
卷号	157 页码:279-285
关键词	REE Rill and interrill erosion Soil erodibility Aggregate stability WEPP model
ISSN号	0341-8162
DOI	10.1016/j.catena.2017.05.032
通讯作者	Liu, Gang(gliu@foxmail.com)
英文摘要	A soil aggregate represents a key soil structural unit that influences several physical soil properties such as water infiltration, runoff and erosion. The relationships between soil aggregate stability and interrill and rill erodibility are critical to process-based erosion prediction models yet remain unclear, likely due to the difficulty of distinguishing between interrill and rill-eroded sediment during the erosion process. This study was designed to partition interrill and sill erosion rates and relate them to the aggregate stability of Ultisols in subtropical China. Six kinds of rare earth elements (REEs) were applied as tracers mixed with two cultivated soils developed over Quaternary red clay or shale at six slope positions. Soil aggregate stability was determined by the Le Bissonnais (LB)-method. Simulated rainfall of three intensities (60, 90 and 120 mm h(-1)) was applied to a soil plot (2.25 m long, 0.5 m wide, 0.2 m deep) at three slope gradients (10 degrees, 20 degrees and 30 degrees) for a duration of 30 min after runoff initiation. The results indicated that rill and interrill erosion rates in the soil developed over shale were considerably greater than those in the soil developed over Quaternary red clay. Equations using an aggregate stability index A(s) to replace the erodibility factor of interrill and rill erosion in the Water Erosion Prediction Project (WEPP) model were constructed after analysing the relationships between estimated and measured rill and interrill erosion data. The results show that these equations based on A, have the potential to improve methods for assessing interrill and rill erosion erodibility synchronously for subtropical Ultisols by using an REE tracing method.
资助项目	Natural Science Basic Research Plan in Shaanxi Province of China[2016JQ4017] ; Ministry of Science and Technology of China[2015BAC01B03-03] ; Natural Science Foundation of China[41201270] ; Natural Science Foundation of China[41371281] ; West Light Foundation of The Chinese Academy of Sciences[2014-91] ; Talents Research Start-up Foundation of Shaanxi Province[2013-02100-Z111021512] ; Chinese Universities Scientific Fund[2452016102] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021403-C2]
WOS关键词	RARE-EARTH-ELEMENTS ; TRACING SEDIMENT MOVEMENT ; SANDY LOAM SOILS ; INTERRILL EROSION ; RILL EROSION ; FLOW ; TRANSPORT ; TRACERS ; DETACHMENT ; RUNOFF
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000406732200025
资助机构	Natural Science Basic Research Plan in Shaanxi Province of China ; Ministry of Science and Technology of China ; Natural Science Foundation of China ; West Light Foundation of The Chinese Academy of Sciences ; Talents Research Start-up Foundation of Shaanxi Province ; Chinese Universities Scientific Fund ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/61472]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Gang
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Hai,Liu, Gang,Liu, Puling,et al. Developing equations to explore relationships between aggregate stability and erodibility in Ultisols of subtropical China[J]. CATENA,2017,157:279-285.
APA	Xiao, Hai,Liu, Gang,Liu, Puling,Zheng, Fenli,Zhang, Jiaqiong,&Hu, Feinan.(2017).Developing equations to explore relationships between aggregate stability and erodibility in Ultisols of subtropical China.CATENA,157,279-285.
MLA	Xiao, Hai,et al."Developing equations to explore relationships between aggregate stability and erodibility in Ultisols of subtropical China".CATENA 157(2017):279-285.