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JOURNAL OF DESERT RESEARCH  2012, Vol. 32 Issue (6): 1583-1589    DOI:
Biology and Soil     
Soil CO2 Concentration under Different Types of Biological Soil Crusts and Its Driving Factors in the Sand-fixed Vegetation Zones
HUANG Lei, ZHANG Zhi-shan, HU Yi-gang, ZHANG Peng, ZHAO Yang
Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
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Abstract  

Soil CO2 emission fluxes under algae crust, moss crust and shifting sand at different soil depths in the sand-fixing vegetation zones were observed using the CO2 profile test method. The distribution characteristics of CO2 concentration and the impact of soil temperature and soil moisture on CO2 concentration under different soil crusts were analyzed. Results showed that the variation range of soil CO2 concentration under algal crust and moss crust at 0-40 cm soil layer was 600-1 100 μmol·mol-1, large than at the same depth of shifting sand, but the difference was not significant. Soil temperature was positively correlated with the soil CO2 concentration, especially in the topsoil, and the order was shifting sand>moss crust>algae crust. The influence of soil moisture on soil CO2 concentration in the topsoil of 0-5 cm soil layer was shifting sand>algal crusts>moss crust, but at 10-40 cm soil layer the order was algae crust>moss crust>shifting sand.

Key words:  sand-fixing vegetation zones      biological soil crusts      soil CO2 concentration      driving factor     
Received:  26 March 2012      Published:  07 May 2012
ZTFLH:  S152.75  

Cite this article: 

HUANG Lei, ZHANG Zhi-shan, HU Yi-gang, ZHANG Peng, ZHAO Yang. Soil CO2 Concentration under Different Types of Biological Soil Crusts and Its Driving Factors in the Sand-fixed Vegetation Zones. JOURNAL OF DESERT RESEARCH, 2012, 32(6): 1583-1589.

URL: 

http://www.desert.ac.cn/EN/     OR     http://www.desert.ac.cn/EN/Y2012/V32/I6/1583

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