Maturity has great effect on grindingdegree when water content is more than 20%.
含水量大于20%时，腐熟度对粉碎度的影响增强。
2
Result: the primary factor which influenced the extraction rate was grindingdegree, then it was time of distillation, solid-liquid ratio and soaking time.
结果：影响挥发油得率的主要因素为粉碎度，其次为蒸馏时间和料液比，最后为浸泡时间。
3
The results showed that raw materials species, grindingdegree, moisture content, and processing techniques have great effects on Daqu in the prior bacteria culture stage.