Pedosphere 18(6): 801--808, 2008
ISSN 1002-0160/CN 32-1315/P
©2008 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effect of long-term application of chemical fertilizers on microbial biomass and functional diversity of a black soil |
KONG Wei-Dong 1, ZHU Yong-Guan1, FU Bo-Jie1, HAN Xiao-Zeng2, ZHANG Lei3 and HE Ji-Zheng1 |
1 Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 (China). E-mail: weidongkong@sohu.com
2 Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Harbin 150040 (China)
3 Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080 (China) |
| ABSTRACT |
| An experiment with seven N, P, K-fertilizer treatments, i.e., control (no fertilizer), NP, NK, PK, NPK, NP2K, and NPK2 where P2 and K2 indicate double amounts of P and K fertilizers respectively, was conducted to examine the effect of long-term continuous application of chemical fertilizers on microbial biomass and functional diversity of a black soil (Udoll in the USDA Soil Taxonomy) in Northeast China. The soil microbial biomass C ranged between 94 and 145 mg kg-1, with the NK treatment showing a lower biomass; the functional diversity of soil microbial community ranged from 4.13 to 4.25, with an increasing tendency from control to double-fertilizer treatments, and to triple-fertilizer treatments. The soil microbial biomass, and the microbial functional diversity and evenness did not show any significant differences among the different fertilizer treatments including control, suggesting that the long-term application of chemical fertilization would not result in significant changes in the microbial characteristics of the black soil. |
| Key Words: Biolog, black soil, chemical fertilizer, microbial biomass, microbial functional diversity |
| Citation: Kong, W. D., Zhu, Y. G., Fu, B. J., Han, X. Z., Zhang, L. and He, J. Z. 2008. Effect of long-term application of chemical fertilizers on microbial biomass and functional diversity of a black soil. Pedosphere. 18(6): 801-808. |
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