Response of soil aggregate disintegration to the different content of organic carbon and its fractions during splash erosion

doi:10.1002/hyp.14060

	Response of soil aggregate disintegration to the different content of organic carbon and its fractions during splash erosion
	Li, Hairu 2; Liu, Gang 1,2; Gu, Ju 2; Chen, Hong 2; Shi, Hongqiang 2; Abd Elbasit, Mohamed A. M.3; Hu, Feinan 1,2
刊名	HYDROLOGICAL PROCESSES
	2021-02-01
卷号	35 期号:2 页码:11
关键词	mechanical striking slaking soil aggregates soil organic carbon splash erosion
ISSN号	0885-6087
DOI	10.1002/hyp.14060
通讯作者	Liu, Gang(gliu@foxmail.com)
英文摘要	Aggregate disintegration is a critical process in soil splash erosion. However, the effect of soil organic carbon (SOC) and its fractions on soil aggregates disintegration is still not clear. In this study, five soils with similar clay contents and different contents of SOC have been used. The effects of slaking and mechanical striking on splash erosion were distinguished by using deionized water and 95% ethanol as raindrops. The simulated rainfall experiments were carried out in four heights (0.5, 1.0, 1.5 and 2.0 m). The result indicated that the soil aggregate stability increased with the increases of SOC and light fraction organic carbon (LFOC). The relative slaking and the mechanical striking index increased with the decreases of SOC and LFOC. The reduction of macroaggregates in eroded soil gradually decreased with the increase of SOC and LFOC, especially in alcohol test. The amount of macroaggregates (>0.25 mm) in deionized water tests were significantly less than that in alcohol tests under the same rainfall heights. The contribution of slaking to splash erosion increased with the decrease of heavy fractions organic carbon. The contribution of mechanical striking was dominant when the rainfall kinetic energy increased to a range of threshold between 9 J m(-2) mm(-1) and 12 m(-2) mm(-1). This study could provide the scientific basis for deeply understanding the mechanism of soil aggregates disintegration and splash erosion.
WOS研究方向	Water Resources
语种	英语
出版者	WILEY
WOS记录号	WOS:000624003800011
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/160485]
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.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China 3.Agr Res Council, Inst Soil Climate & Water, Pretoria, South Africa
推荐引用方式 GB/T 7714	Li, Hairu,Liu, Gang,Gu, Ju,et al. Response of soil aggregate disintegration to the different content of organic carbon and its fractions during splash erosion[J]. HYDROLOGICAL PROCESSES,2021,35(2):11.
APA	Li, Hairu.,Liu, Gang.,Gu, Ju.,Chen, Hong.,Shi, Hongqiang.,...&Hu, Feinan.(2021).Response of soil aggregate disintegration to the different content of organic carbon and its fractions during splash erosion.HYDROLOGICAL PROCESSES,35(2),11.
MLA	Li, Hairu,et al."Response of soil aggregate disintegration to the different content of organic carbon and its fractions during splash erosion".HYDROLOGICAL PROCESSES 35.2(2021):11.