Fig. 2
Response surface plots of the effect of various factors on the inhibition rate of S. sapinea growth by fermented filtrate of B. pumilus HR10 and validation of the optimal formulation. A The response surface and contour plots for the effects of corn flour and beef extract on inhibition rate at middle level of MgSO4 contents; B The response surface and contour plots for the effects of corn flour and MgSO4 on inhibition rate at middle level of beef extract contents; C The response surface and contour plots for the effects of beef extract and MgSO4 on inhibition rate at middle level of corn flour contents; D Validation of the optimal formulation for the inhibition rate of S. sapinea growth by fermented filtrate of B. pumilus HR10