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