Fig. 6. The partial least squares pathway model (PLS-PM) shows the direct and indirect effects of straw return, soil bacteria, fungi and soil carbon metabolism capacity on soil carbon and nitrogen components.
Note: (A): Partial least squares path modelling; (B): Effect of different factors on soil carbon and nitrogen fractions. Stars denote for significance at P < 0.05 and P < 0.01 probability levels (* and **, respectively).
Table S1 The basic physical and chemical properties of initial soil(2018yr).