Figure 8
The structural equation model (SEM) between environmental factors and lily yield (A), and the direct and indirect effects of environmental variables on lily yield (B). The width of the arrows in (A) indicates the strength of the standardized path coefficient. The solid lines indicate positive path coefficients and dashed lines indicate negative path coefficients, R2 values represent the proportion of the variance explained for each endogenous variable. Available nutrients were represented by the first component from a principal-component analysis (PCA) conducted with available nitrogen (AN), available phosphorus (AP), and available potassium (AK). Microbial community is represented by the first component of the PCA of dominant bacteria at order level (the top ten most abundant orders).
