干旱区生态环境知识资源中心(Arid): Litter cover promotes biocrust decomposition and surface soil functions in sandy ecosystem

Arid

DOI	10.1016/j.geoderma.2020.114429
	Litter cover promotes biocrust decomposition and surface soil functions in sandy ecosystem
	Wu, Gao-Lin; Zhang, Meng-Qi; Liu, Yu; Lopez-Vicente, Manuel
通讯作者	Wu, GL
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2020
卷号	374
英文摘要	Ecological restoration of sandy inland ecosystems is important for achieving global sustainability. In the world's semi-arid regions, soil crusts play crucial roles in maintaining ecosystem functioning. However, the true extent of soil quality improvement during the development of crusts is an issue not solved. In this study, four development stages of natural soil crusts, i.e., physical crusts (PC), biocrusts (BC), litter covered biocrusts (LBC) and litter crusts (LC) were selected in a semi-arid sandy ecosystem, along with a bare sandy land (BSL) as control area, to evaluate soil physicochemical properties at different soil depths. The coverage of litter (mainly leaves of Populus simonii) increased soil moisture and reduced soil bulk density. Compared with BC, the content of total soil organic matter (SOM) decreased in LBC by 13.83% and increased in LC by 36.57%. In contrast with BC, LC promoted a significant increase in soil nutrients, such as total nitrogen (30.30%), total phosphorus (46.89%) and available potassium (34.40%) in the topsoil layer (0-2 cm). Besides, LC contained higher clay and silt contents (10.47% and 29.81%) and lower sand content (-1.02%) than BC. In the 0-10 cm soil layer, the D (fractal dimension of the soil particle size distribution) of LC was the largest, with a value 5.71%, 6.1%, 2.44% and 0.93% higher than D in BSL, PC, BC and LBC, respectively. These findings reveal that litter covering facilitate the disintegration of BC, which further forms LC, and these processes clearly promote the enhancement of soil quality under sandy semi-arid conditions. Our findings are particularly important for predicting the transformation processes of sandy soil crusts and are of interest in ecological restoration programs.
英文关键词	Soil crust Ecological restoration Sandy ecosystem Soil nutrient Soil organic matter Soil particle size
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000540257900016
WOS关键词	PARTICLE-SIZE DISTRIBUTION ; ORGANIC-MATTER ; LOESS PLATEAU ; FRACTAL FEATURES ; CLIMATE-CHANGE ; LAND-USE ; CRUSTS ; CARBON ; DESERTIFICATION ; RUNOFF
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324747
作者单位	[Wu, Gao-Lin; Zhang, Meng-Qi; Liu, Yu] Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Wu, Gao-Lin; Liu, Yu] Chinese Acad Sci & Minist Water Resource, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; [Lopez-Vicente, Manuel] Wageningen Environm Res, Team Soil Water & Land Use, Droevendaalsesteeg 3, NL-6708 RC Wageningen, Netherlands; [Wu, Gao-Lin] CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Wu, Gao-Lin,Zhang, Meng-Qi,Liu, Yu,et al. Litter cover promotes biocrust decomposition and surface soil functions in sandy ecosystem[J]. 西北农林科技大学,2020,374.
APA	Wu, Gao-Lin,Zhang, Meng-Qi,Liu, Yu,&Lopez-Vicente, Manuel.(2020).Litter cover promotes biocrust decomposition and surface soil functions in sandy ecosystem.GEODERMA,374.
MLA	Wu, Gao-Lin,et al."Litter cover promotes biocrust decomposition and surface soil functions in sandy ecosystem".GEODERMA 374(2020).