The Effects of Different Fertilization on the Functional Diversity of Soil Microbial Community

doi:10.11924/j.issn.1000-6850.2012-0989

Abstract

Abstract: In order to study the influence of fertilization management on the functional diversity of farmland soil microbial community (maize-wheat rotation) in the North China farming areas, this paper studied the functional diversity of soil microbial communities of the farmland (maize-wheat rotation) by Biolog-ECO technology, in Wu Qing field ecosystem station run by Chinese Academy of Agricultural Sciences. The results showed that (1) the rate of soil microbial carbon source utilization for single application of organic fertilizer (A1) was significantly higher than that of the control without fertilization (A0). (2) soil microbial communities richness (H) and dominance index (D) for single organic fertilizer was 2.413 and 0.902 separately, significantly higher than the recommended fertilization (A2) and no fertilizer. The uniformity index (E) in the recommended fertilization treatments was the highest, significantly higher than the single application of chemical fertilizer (A4) but no significant difference from the other treatments. (3) Principal component analysis showed that soil microbial community carbon source utilization was similar for the recommended fertilization and conventional fertilization treatment, with the unique way for the only organic fertilizer and chemical fertilizer, and sugars, amino acids and metabolic intermediates and secondary metabolites were the main carbon source for soil microbes. It concluded that adding organic fertilizer was helpful to improve the metabolic activity of microorganism and the functional diversity of soil microbial communities.

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