脱脂乳+20%番茄汁+2%菊芋抽提液作为种子培养基产酸速度快，双歧杆菌活菌数高。

• Several formula of seed mediums were compared, milk+20%25 tomato juice+2%25extractions from Jerusalem artichoke can accelerate to produce acid, attain higher Bifidobacterium Longum number.