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JOURNAL OF DESERT RESEARCH  2018, Vol. 38 Issue (1): 111-116    DOI: 10.7522/j.issn.1000-694X.2017.00073
Effects of Biological Soil Crusts Types on Soil Physicochemical Properties in the Southeast Fringe of the Tengger Desert
Du Jun1,2, Li Yixuan3, Yang Xiaoxia4, Li Yunfei1,2, Ma Xiaojun1,2
1. Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 101408, China;
3. College of Agriculture, Shenyang Agricultural University, Shenyang, 110866;
4. College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
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Abstract  Biological Soil Crusts (BSCs) are a critical part of the surface landscape in desert ecosystem, and play a key role in the recovery of desertified land and the fixation moving-dune. The physicochemical properties of BSCs and their respective subsoils in the revegetation area of the southeast margin in the Tengger desert were investigated, and the effects of BSCs on subsoil were analyzed. The results indicated that:the thickness, porosity, silt and clay content, field water holding capacity and the concentrations of organic carbon, inorganic carbon, total nitrogen, available nitrogen, available phosphorus, available potassium and electronic conductivity of crusts layer were moss crust > mixed crust > lichen crust > algae crust, while sand content and bulk density were moss crust < mixed crust < lichen crust < algae crust. The physicochemical properties of the 0-2 cm and 2-5 cm soil layers below crusts showed the same patterns. In general, the effects of moss crust and mixed crusts on their subsoil were greater than those of lichens and algae crusts; the influence of crusts on subsoils decreased with the increase of soil depth. Our results suggest that the colonization and development of BSCs are the key factors thataffect soil formation and soil quality in desert ecosystem.
Key words:  biological soil crusts      topsoils      physicochemical properties      sand fixation vegetation area      Tengger Desert     
Received:  17 May 2017      Published:  20 January 2018

Cite this article: 

Du Jun, Li Yixuan, Yang Xiaoxia, Li Yunfei, Ma Xiaojun. Effects of Biological Soil Crusts Types on Soil Physicochemical Properties in the Southeast Fringe of the Tengger Desert. JOURNAL OF DESERT RESEARCH, 2018, 38(1): 111-116.

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