Its fermentation media in shaking flask were optimized. Average yield of SSG came to 12. 03g/L,percentage yield bassed on soluble starch was 40. 1%.

• 本文通过单因子试验和正交试验对其摇瓶发酵条件进行了优选，使SSG的产率达到12.；03g/L，碳源转化率达40