| 组别 | 1 | 2 | 3 |
| NH4Cl g/100mL | 1.00 | 0.75 | 0.50 |
| NaHCO3 g/100mL | 0.50 | 0.75 | 1.00 |
| Na2HPO4 g/100mL | 0.10 | 0.10 | 0.10 |
| NaCl g/100mL | 1.00 | 1.00 | 1.00 |
| 琼脂糖 g/100mL | 1.50 | 1.50 | 1.50 |