2.6 Statistical analyses
All the analyses were performed using SPSS ver. 21.0 for Windows. Means and standard deviations were calculated for all the data. One-way analysis of variance (ANOVA), Student–Newman–Keuls (SNK) tests, and least significant difference (LSD) tests were performed to compare mean values of biomass and C storage in the plant and soil components among all the treatments. Significance levels were set at P < 0.05 for all statistical analyses.