extremely significantp ≤ 0.01
According to the analysis of variance ( Table 2 ), the interaction terms of X 1 X 2 , X 1 X 4 , X 1 X 5 , X 2 X 3 , X 2 X 5 , X 3 X 4 , X 4 X 5 and X 1 X 2 2 X 3 were extremely significant (p ≤ 0.01), indicating that their interaction can significantly affect the mycelial growth of H. erinaceus .