| Drying methods | |||||
|---|---|---|---|---|---|
| Moisture | Protein | Fat | Ash | ||
| Control | 80.75±0.09 | 4.27±0.06f | 0.27±0.03f | 1.31±0.03g | |
| Sun-drying | 11.14±0.23c | 18.45±0.02d | 0.68±0.15e | 7.77±0.15a | |
| Hot-air drying | 40 | 11.91±0.06bc | 18.56±0.10d | 1.62±0.10abc | 7.61±0.23a |
| 50 | 11.69±0.06bc | 18.60±0.13d | 0.81±0.16e | 5.68±0.15de | |
| 60 | 12.85±0.42b | 20.15±0.31ab | 1.31±0.06d | 5.69±0.06de | |
| Low temperature vacuum drying | 20 | 12.28±0.06bc | 18.76±0.08d | 1.86±0.19a | 7.32±0.19b |
| 25 | 12.88±0.31b | 17.92±0.01e | 1.55±0.10bcd | 5.36±0.16f | |
| 30 | 12.00±0.15bc | 19.86±0.20b | 1.52±0.29bcd | 5.49±0.09ef | |
| Heat pump dehumidifying drying | 30 | 11.50±0.22c | 19.31±0.16c | 1.73±0.06ab | 5.41±0.10f |
| 40 | 11.80±0.76bc | 20.40±0.68a | 1.40±0.15cd | 5.99±0.19c | |
| 50 | 11.00±0.24c | 20.60±0.54a | 1.27±0.26d | 5.96±0.06c | |
| Freeze drying | 12.11±0.84bc | 18.78±0.22d | 1.76±0.18ab | 5.83±0.11cd | |