Standardized direct effect, indirect effect and total effect of critical environmental factors on aboveground biomass (AGB), belowground biomass (BGB) and root to shoot ratio (R/S).

Note: The “**” represented the significant. All designations are the same as those in the footnotes below Table 1.注：此处“**”代表具有显著性。所有标识均与表1下方脚注中的规定一致。