Figure 9.

Correlation analysis of gut microbes and volatile fatty acids in calves (Note: The X-axis and Y-axis are environmental factors and species, respectively, and R and p-values are obtained by calculation. R-values are shown in different colors in the graph. If the p-value is less than 0.05, it is marked with a *. The legend on the right is the color interval of different R-values. You can choose to present a cluster tree of species and environmental factors (such as left and top). ** 0.001 * 0.01 < 0.05, or less p < 0.01).