2.7 Statistical analysis
The significant differences between the mean under different land covers were tested using analysis of variance (ANOVA) and compared by Tukey post hoc test at α ≤ 0.05 significance level. The statistical relationship between different parameters and factors influencing them was assessed using Pearson correlation analysis. Regression analysis was carried out to investigate the relationship between the dependent variable (N-mineralization) with independent variables (TN and C:N ratio). All statistical analyses in this study were performed using SPSS21.0