Item | Control | Experiment | SEM | P-value |
DMI (kg/d) | 19.65 | 21.79 | 0.26 | <0.01 |
Milk yield (kg/d) | 33.21 | 36.61 | 1.37 | 0.06 |
Milk fat rate (%) | 3.37 | 3.39 | 0.25 | 0.97 |
Milk fat yield (kg/d) | 1.13 | 1.20 | 0.03 | 0.28 |
Milk protein rate (%) | 3.37 | 3.28 | 0.06 | 0.32 |
Milk protein yield (kg/d) | 1.10 | 1.23 | 0.07 | 0.34 |
Lactose rate (%) | 4.69 | 4.88 | 0.03 | <0.01 |
Somatic cell count (ten thousand/ml) | 20.51 | 15.1 | 6.93 | 0.53 |