Items2 | LMY | MMY | HMY | SEM | P-value |
---|
Milk yield, kg/d | 29.6c | 38.2b | 45.8a | 2.08 | 0.024 |
Milk fat, % | 3.88a | 3.70b | 3.65b | 0.31 | 0.038 |
Milk protein, % | 3.36a | 3.30ab | 3.21b | 0.27 | 0.031 |
Total milk solids, % | 13.0a | 12.5ab | 12.0b | 0.99 | 0.040 |
FCM yield, kg/d | 28.9c | 36.4b | 43.5a | 2.38 | 0.042 |
ECM yield, kg/d | 29.6c | 37.3b | 44.2a | 2.48 | 0.039 |
- 1LMY low milk yield (< 34.7, n = 30), MMY medium milk yield (34.7–41.5, n = 49), HMY high milk yield (> 41.5, n = 32), n number of observations in the data set
- 2FCM Fat-corrected milk (kg/d) = 0.4 × milk yield (kg/d) + 15 × fat yield (kg/d). ECM Energy-corrected milk (kg/d) = milk yield (kg/d) × [(38.3 × fat (%) × 10 + 24.2 × protein (%) × 10 + 16.54 × lactose (%) × 10 + 20.7) ÷ 3140]
- a-cMeans in the same row with different superscripts are significantly different (P < 0.05)