| 因素 Factor | 水平 Level | ||
| −1 | 0 | 1 | |
| 发酵时间(A)/d fermentation time | 3 | 4 | 5 |
| 初始pH (B) Initial pH value | 3.5 | 4 | 4.5 |
| 接种量(C)/% Inoculum amount | 0.15 | 0.2 | 0.25 |
| 加糖量(D)/% Additive amount of sugar | 16 | 18 | 20 |