將jiang大da豆dou充chong分fen蒸zheng熟shu後hou與yu曲qu充chong分fen攪jiao拌ban好hao,加jia水shui,並bing用yong食shi鹽yan防fang腐fu,裝zhuang入ru筒tong內nei,放fang置zhi一yi定ding時shi間jian,就jiu製zhi成cheng了le。曲qu中zhong含han有you的de酶mei使shi米mi中zhong的de澱dian粉fen類lei發fa生sheng糖tang化hua,同tong時shi分fen解jie大da豆dou的de蛋dan白bai質zhi,產chan生sheng甜tian味wei和he美mei味wei。接jie著zhe由you於yu空kong氣qi中zhong來lai的de酵jiao母mu、細菌的繁殖產生乳酸及其它有機酸,進而與醇結合生成酯,給予大醬以特有的香味,這就是所謂的釀成。
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