干旱区生态环境知识资源中心(Arid): Physical Crust Formation on Sandy Soils and Their Potential to Reduce Dust Emissions from Croplands

Arid

DOI	10.3390/land9120503
	Physical Crust Formation on Sandy Soils and Their Potential to Reduce Dust Emissions from Croplands
	Vos, Heleen C.; Fister, Wolfgang; Eckardt, Frank D.; Palmer, Anthony R.; Kuhn, Nikolaus J.
通讯作者	Vos, HC (corresponding author), Univ Basel, Phys Geog & Environm Change Res Grp, CH-4056 Basel, Switzerland.
来源期刊	LAND
EISSN	2073-445X
出版年	2020
卷号	9 期号:12
英文摘要	The sandy croplands in the Free State have been identified as one of the main dust sources in South Africa. The aim of this study was to investigate the occurrence and strength of physical soil crusts on cropland soils in the Free State, to identify the rainfall required to form a stable crust, and to test their impact on dust emissions. Crust strength was measured using a fall cone penetrometer and a torvane, while laboratory rainfall simulations were used to form experimental crusts. Dust emissions were measured with a Portable In-Situ Wind Erosion Laboratory (PI-SWERL). The laboratory rainfall simulations showed that stable crusts could be formed by 15 mm of rainfall. The PI-SWERL experiments illustrated that the PM10 emission flux of such crusts is between 0.14% and 0.26% of that of a non-crusted Luvisol and Arenosol, respectively. The presence of abraders on the crust can increase the emissions up to 4% and 8% of the non-crusted dust flux. Overall, our study shows that crusts in the field are potentially strong enough to protect the soil surfaces against wind erosion during a phase of the cropping cycle when the soil surface is not protected by plants.
英文关键词	wind erosion soil crusts PI-SWERL rainfall experiment crust strength
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SSCI
WOS记录号	WOS:000602125700001
WOS关键词	THRESHOLD FRICTION VELOCITIES ; WIND EROSION ; INTERRILL EROSION ; LAND DEGRADATION ; HUMAN HEALTH ; DESERT DUST ; PI-SWERL ; TRANSPORT ; MOISTURE ; STRENGTH
WOS类目	Environmental Studies
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349066
作者单位	[Vos, Heleen C.; Fister, Wolfgang; Kuhn, Nikolaus J.] Univ Basel, Phys Geog & Environm Change Res Grp, CH-4056 Basel, Switzerland; [Eckardt, Frank D.] Univ Cape Town, Dept Environm & Geog Sci, ZA-7701 Cape Town, South Africa; [Palmer, Anthony R.] Agr Res Council Anim Prod, ZA-6140 Grahamstown, South Africa
推荐引用方式 GB/T 7714	Vos, Heleen C.,Fister, Wolfgang,Eckardt, Frank D.,et al. Physical Crust Formation on Sandy Soils and Their Potential to Reduce Dust Emissions from Croplands[J],2020,9(12).
APA	Vos, Heleen C.,Fister, Wolfgang,Eckardt, Frank D.,Palmer, Anthony R.,&Kuhn, Nikolaus J..(2020).Physical Crust Formation on Sandy Soils and Their Potential to Reduce Dust Emissions from Croplands.LAND,9(12).
MLA	Vos, Heleen C.,et al."Physical Crust Formation on Sandy Soils and Their Potential to Reduce Dust Emissions from Croplands".LAND 9.12(2020).