Effects of Different Tillage Modes on Metabolic Functional Diversity of Soil Microbial Community

doi:10.11924/j.issn.1000-6850.2012-1027

Abstract

Abstract: The effects of different tillage modes on soil microbe functional diversity were evaluated in this paper through different tillage test on soil before planting. The soil microbial metabolism diversity in four tillage modes including abandoned, tilled, no-tillage and rotary were examined by the method of Biolog ECO-micro plate culture．The result showed that within 168 h of culture, the average well color development (AWCD) was obviously higher in no-tillage than in the tilled mode. The functional diversity, dominance and richness index of soil microbes in no-tillage and abandoned were incredibly similar, when they fell significantly in tilled and rotary treatments. The result of PCA and cluster analysis demonstrated that the carbon source metabolic pattern and ability of the soil microbes in no-tillage was similar to that in abandoned, while it had a significant alteration in tilled and rotary. Different tillage modes could affect the metabolic and functional diversity of soil microbial communities significantly; no-tillage had better protective effect than other tillage modes.

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