highly significantp < 0.0001
Accordingly, the second-order polynomial equation was established as follows: Y = − 9.16012 + 0.123691 × A + 0.143075 × B + 0.162185 × C − 0.0001375 × A × B − 7.5 × 10 − 5 × A × C + 3 × 10 − 5 × B × C − 0.0014058 × A 2 − 0.0013893 × B 2 − 0.0015433 × C 2 From Table 2 , it is evident that the model’s regression is highly significant ( p < 0.0001), with a lack of fit of 0.3369, exceeding the significance threshold of 0.05.