Responses of soil aggregate stability, erodibility and nutrient enrichment to simulated extreme heavy rainfall

doi:10.1016/j.scitotenv.2019.136150

	Responses of soil aggregate stability, erodibility and nutrient enrichment to simulated extreme heavy rainfall
	Yao, Yufei 2,3,5; Liu, Jiao 2; Wang, Zhao 2; Wei, Xiaorong 2,3,4; Zhu, Hansong 2; Fu, Wei 1; Shao, Mingan 2,3,4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-03-20
卷号	709 页码:9
关键词	Soil texture Water-stable aggregate Enrichment ratio Successive rainfall Drying
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.136150
通讯作者	Wei, Xiaorong(xrwei78@163.com)
英文摘要	Extreme precipitation regime under global change context is estimated to cause heavy rainstorms and longer drought intervals. Temporal variations of soil structure and erosion characteristics during and after heavy rainstorms were less investigated, particularly across a wide soil texture gradient. In this study, 15 soilswere selected with clay content ranging in 12.9-38.2%. Soil erosion characteristics and enrichment ratios of organic carbon (EROC) and nitrogen (E-RN) were measured during 3 successive rainfall simulations at slope of 15 degrees and intensity of 120 mm h(-1). The water-stable aggregate distributionwas measured for soils before and after rainfall and drying. The mean weight diameter (MWD) of water-stable aggregate remained unchanged before (1.476 +/- 0.182) and after rainfall and drying (1.406 +/- 0.135 mm), but decreased for soils with higher organic carbon contents. Soil erodibility (K factor) averaged in 0.018 +/- 0.003, 0.011 +/- 0.001 and 0.008 +/- 0.001 in 3 successive rainfall events, with 42% and 27% decreases after each event, respectively (P < 0.05); and the decreases were greater for less aggregated soils or coarser textured soils. Stepwise regression showed that the <0.25 mm water-stable aggregate explained most variations of K and its dynamics. The EROC and E-RN were close to 1 andwere not correlated with clay content or MWD (P > 0.05). The E-RN decreased first and then remained stable, and EROC was unchanged during successive rainfalls. These results indicated that soil texture or aggregation status affected soil erodibility and its temporal changes in successive rainstorms. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41977068] ; National Natural Science Foundation of China[41571130082] ; National Natural Science Foundation of China[41571296] ; National Natural Science Foundation of China[41622105] ; National Key Research and Development Program[2018YFC0507001] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23070202] ; Chinese Academy of Sciences program[QYZDB-SSW-DQC039] ; Northwest A & F University program[2452017028] ; Special-Funds of Scientific Research Programof State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021403-Q5]
WOS关键词	ORGANIC-MATTER ; AGRICULTURAL MANAGEMENT ; PHYSICAL-PROPERTIES ; SEDIMENT TRANSPORT ; FOREST SOILS ; EROSION ; RUNOFF ; CARBON ; PRECIPITATION ; SIZE
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000512281700089
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Chinese Academy of Sciences program ; Northwest A & F University program ; Special-Funds of Scientific Research Programof 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/311030/132799]
专题	中国科学院地理科学与资源研究所
通讯作者	Wei, Xiaorong
作者单位	1.Hebei GEO Univ, Sch Land Resources & Urban & Rural Planning, Shijiazhuang 050031, Hebei, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yao, Yufei,Liu, Jiao,Wang, Zhao,et al. Responses of soil aggregate stability, erodibility and nutrient enrichment to simulated extreme heavy rainfall[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,709:9.
APA	Yao, Yufei.,Liu, Jiao.,Wang, Zhao.,Wei, Xiaorong.,Zhu, Hansong.,...&Shao, Mingan.(2020).Responses of soil aggregate stability, erodibility and nutrient enrichment to simulated extreme heavy rainfall.SCIENCE OF THE TOTAL ENVIRONMENT,709,9.
MLA	Yao, Yufei,et al."Responses of soil aggregate stability, erodibility and nutrient enrichment to simulated extreme heavy rainfall".SCIENCE OF THE TOTAL ENVIRONMENT 709(2020):9.