Table 6.
Effect of milk production level calf body weight (BW) for beef cows
| Measurement | Milk production1 | SEM | P-value | ||
|---|---|---|---|---|---|
| Low | Mod | High | |||
| Calf BW, kg | |||||
| Birth | 35.7 | 35.3 | 36.4 | 0.7 | 0.28 |
| Mid-weight2 | 116a | 125b | 128b | 2 | < 0.01 |
| Actual weaning | 285 | 294 | 295 | 5 | 0.22 |
| 205-d adjusted3 | 270 | 278 | 279 | 6 | 0.55 |
| Kilograms calf weaned per cow exposed, kg4 | 232a | 250b | 222c | 4 | 0.02 |
a–c
Means with different superscripts differ (P ≤ 0.05).
1
Milk production groups: Low (6.57 ± 1.21 kg), Mod (9.02 ± 0.60 kg), or High (11.97 ± 1.46 kg).
2
Mid-weight taken at ∼ d 58 postpartum.
3
Weaning weight adjusted to 205 d of age using Beef Improvement Federation adjustments without age of dam or calf sex.
4
Based on the subsequent year's actual (unadjusted) calf weaning BW and percentage of exposed cows to a breeding bull during the year of the study.