extremely significantP ≤ 0.001
2C , the bacterial Chao1 index of high-temperature Daqu (255.40 ± 37.47) was higher than that of medium-temperature Daqu (134.16 ± 16.55), and the difference was extremely significant ( P ≤ 0.001), indicating that high-temperature Daqu had more bacterial species than medium-temperature Daqu.