2.5Statistical analysis
Data were analysed using one-way analysis of variance for different groups of soil depth within each fertilization regime and different groups of fertilization regimes within each soil depth, and were compared using Duncan’s test in SPSS 19.0 (SPSS Inc., Chicago, IL, USA), with significance defined as P <0.05. The relationship between the microbial structures and physicochemical properties was analysed using redundancy analysis (RDA) using Canoco 5.0 for Windows (Microcomputer Power, Ithaca, NY, USA).
RESULTS