2.6. Statistical analysis
For all response variables, significant differences (P< 0.05) among water regimes in each soil and significant
differences among soils in each water regime were assessed by one-way
analysis of variance (ANOVA). The effects of water regimes (one
constant-moisture control treatment at 60% WHC and two DWC treatments
of 100-20% and 80-40% WHC), soil treatments (OF, BF and BF+) and their
interactions on C decomposition, fungal-to-bacterial ratio (F:B), MBC
and DOC were assessed by linear mixed models (LMM). For the LMM, soil
treatment and water regime were considered as fixed factors, and sample
identity was regarded as a random factor. All statistical analyses were
performed using IBM SPSS Statistics 20 (IBM SPSS Inc.), and graphs were
drawn using SigmaPlot 14.0 (Systat Software Inc.).