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| Characteristics of Microorganisms and Enzyme Activity underTwo Plant Communities in Desert Steppe |
| Ma Wenwen1, Yao Tuo1, Jin Peng2, Wang Guoji1, Zhang Yuxia1 |
1. Pratacutural College/Key Laboratory of Grassland Ecosystem of Ministry of Education, Gansu Agricultural University, Lanzhou 730070, China;
2. Jinchang People's Government of Gansu Province, Jinchang 737100, Gansu, China |
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Abstract Soil microbial quantities, microbial biomass and enzyme activity of desert steppe ecosystem under different plant communities in desert steppe in Jinchang, Gansu, China were studied in this paper. The results showed that the changes tendency of soil microbial quantities, microbial biomass C, N and enzyme activity of community dominated by Kalidium foliatum were much higher than that of the community dominated by Alhagi sparsifolia, while the microbial biomass P opposite. The number of soil microbial (bacteria and actinomycetes), microbial biomass (C, N, P) and enzyme activity decreased with the soil depth in vegetation coverage, The soil urease showed a "high-low-high-low" trend and maximum fungus in the subsurface layer of soil in community of A. sparsifolia grassland. Meanwhile, the result of correlation analysis indicated that there were significant correlation among soil microbial quantities, soil microbial biomass and soil enzyme activity.
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Received: 07 June 2013
Published: 20 January 2014
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Corresponding Authors:
姚拓，yaotuo@gsau.edu.cn
E-mail: yaotuo@gsau.edu.cn
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2014, Vol. 34 
