The problems of slow temperature rise and sundry bacteria contamination (such as mucor contamination) easily occured in the earlier period of Daqu culture in winter.

• 冬季培曲前期,曲易出现升温过缓、感染毛霉等杂菌,研究通过添加鲜曲或活性干酵母和根霉菌强化接种来解决该问题。