干旱区生态环境知识资源中心(Arid): Biocrusts reduce surface soil infiltrability and impede soil water infiltration under tension and ponding conditions in dryland ecosystem

Arid

DOI	10.1016/j.jhydrol.2018.11.051
	Biocrusts reduce surface soil infiltrability and impede soil water infiltration under tension and ponding conditions in dryland ecosystem
	Xiao, Bo 1,2,3; Sun, Fuhai 1,2; Hu, Kelin 1,2; Kidron, Giora J.4
通讯作者	Xiao, Bo
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	568 页码:792-802
英文摘要	Biocrust effects on soil water infiltration and hydropedological processes have attracted increasing attention in dryland ecosystems, but are nevertheless subjected to great controversy. According to some scholars, infiltration was assumed to decrease due to repellency and to increase with the organic matter content due to its role in increasing aggregate stability and porosity. These assumptions were checked in our study on the Loess Plateau of China. By using double-ring and disc infiltrometers, the infiltration curves of cyanobacteria and moss biocrusts as well as on bare soil were continuously measured, and the characteristics of water infiltration on biocrust-covered soil and its correlations with soil properties were analyzed. Our results showed that the cyanobacteria and moss biocrusts had significantly lower constant infiltration rates under ponding conditions (0.265 and 0.180 cm min(-1), respectively) as compared with the bare sand (0.372 cm min(-1)), and they took significantly more time (41% and 105%) and water (14% and 73%) to reach steady-state infiltration. Similarly, the saturated hydraulic conductivities of the cyanobacteria and moss biocrusts were 39% (0.514 cm min(-1)) and 65% (0.295 cm min(-1)) lower than that of the bare sand (0.839 cm min(-1)), respectively. More importantly, biocrust infiltrability was closely related with biocrust characteristics and soil properties, especially particle-size distribution and crust thickness. Contrary to some assumptions that attributed impeded infiltration to crust repellency, and increased infiltration to the role played by OM, both variables could not have explained the current results. Under tension and ponding conditions, cyanobacteria and moss biocrusts were found to greatly reduce surface soil infiltrability and impede soil water infiltration. These findings should be considered for future analyses of hydropedological processes in arid and semiarid regions.
英文关键词	Biological soil crust Microbiotic crust Soil infiltrability Double-ring infiltrometer Disc infiltrometer Loess Plateau in China
类型	Article
语种	英语
国家	Peoples R China ; Israel
收录类别	SCI-E
WOS记录号	WOS:000455694400063
WOS关键词	LOESS PLATEAU ; SAND DUNES ; PHYSICAL-PROPERTIES ; MICROBIOTIC CRUSTS ; WESTERN NEGEV ; DESERT ; VEGETATION ; RUNOFF ; CONSEQUENCES ; EVAPORATION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	西北农林科技大学 ; 中国农业大学 ; Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217119
作者单位	1.China Agr Univ, Coll Resources & Environm Sci, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China; 2.Minist Agr, Key Lab Arable Land Conservat North China, Beijing 100193, Peoples R China; 3.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 4.Hebrew Univ Jerusalem, Inst Earth Sci, Givat Ram Campus, IL-91904 Jerusalem, Israel
推荐引用方式 GB/T 7714	Xiao, Bo,Sun, Fuhai,Hu, Kelin,et al. Biocrusts reduce surface soil infiltrability and impede soil water infiltration under tension and ponding conditions in dryland ecosystem[J]. 西北农林科技大学, 中国农业大学, Hebrew University of Jerusalem,2019,568:792-802.
APA	Xiao, Bo,Sun, Fuhai,Hu, Kelin,&Kidron, Giora J..(2019).Biocrusts reduce surface soil infiltrability and impede soil water infiltration under tension and ponding conditions in dryland ecosystem.JOURNAL OF HYDROLOGY,568,792-802.
MLA	Xiao, Bo,et al."Biocrusts reduce surface soil infiltrability and impede soil water infiltration under tension and ponding conditions in dryland ecosystem".JOURNAL OF HYDROLOGY 568(2019):792-802.