The optimum fermentation condition was studied by an orthogonal method, which is glucose 50g/L, yeast extract paste 30g/L, MgSO4 0.5g/L.

• 利用正交设计试验探索出该变异株的最佳发酵培养基配比为葡萄糖50g/L，酵母膏30g/L，硫酸镁0.；5g/L。