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- Title
Screening of MICP Indigenous Microorganisms in Salt Desert Environment in Qaidam Basin.
- Authors
YUAN Yuan; ZHAO Yuan; ZHANG Binglai; WANG Xinhong; HOU Fuxing; ZHANG Wen
- Abstract
In the extreme environment of the cold and arid salt desert in northwest China, finding and discovering indigenous high-yielding urease microorganisms is the key to the research on the solidification and fixation of the surface salt desert soil or desert soil microenvironment. This paper takes the screening of salt-tolerant and high-producing urease microorganisms in the salt desert environment of the Qaidam Basin as the research objective. For the soil samples, water samples and salt-tolerant plants in the environment, techniques such as purification and separation, strain urease activity determination, and Berthelot reaction are used, to screen, isolate and identify an indigenous salt-tolerant high-producing urease microorganism, and further conduct the experimental study on the indigenous microbial flora, urease activity, mineralization ability and safety. The results showed that the indigenous salt-tolerant and high-producing urease microorganisms that were screened this time belonged to a kind of Staphylococcus xylosus, and its urease activity showed a peak change with the life cycle of the microorganisms, with the highest value of 2.24 U/mL, which belonged to the high-yielding microorganisms. The microorganism produces 8.6% of new calcium carbonate in a 10 mL induction solution with a soluble salt content of 7%, and possesses the ability of microbial mineralization. The indigenous salt-tolerant and high-yielding urease microorganisms screened out in the salt desert environment can be used for theoretical and technological innovation research on the prevention and control of microbial mineralization in the cold and dry salt desert in northwest China.
- Subjects
CHINA; DESERT soils; DESERTS; SOLUBLE salts; UREASE; HALOPHYTES; EXTREME environments
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 1, p67
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.2117.21.338