Fig. 5

Effects of the treatments on the metallic element release rates at different decomposition phases. The values are presented as the means ± SEs (n = 3). A positive value indicates that the observed value is greater than the expected value and vice versa. Statistical significance levels: *, P < 0.05; **, P < 0.01; and ***, P < 0.001. The inset values indicate the proportion of corresponding significant interactions (synergistic and antagonistic interactions above and below the zero line, respectively) in a total of 24 cases. Treatments: P. + C., P. massoniana + C. funebris; P. + Q., P. massoniana + Q. variabilis; and so on