Table 1.
Live weight, growth and pre-weaning intake of dairy calves supplemented with 3-NOP (3 mg/kg BW) until 60 weeks of age.
| Parameter | CONT | 3-NOP | P-value | ||
|---|---|---|---|---|---|
| TRT | Week | TRT*Week | |||
| Live weight, kg | |||||
| Birth | 40.8 ± 3.96 | 43.4 ± 3.74 | 0.154 | ||
| Week 23 | 175.7 ± 4.34 | 172.1 ± 4.17 | 0.633 | ||
| Week 57 | 361 ± 12.5 | 347 ± 11.8 | 0.434 | ||
| Week 60 | 382 ± 11.9 | 360 ± 11.2 | 0.179 | ||
| Week 0 to 23 | 105.7 ± 3.55 | 104.4 ± 3.35 | 0.807 | 0.001 | 0.997 |
| Week 57 to 60 | 370.1 ± 9.22 | 354.2 ± 8.90 | 0.235 | 0.320 | 0.422 |
| ADG week 0 to 23, kga | 0.83 ± 0.04 | 0.79 ± 0.04 | 0.398 | 0.001 | 0.998 |
| ADG week 57 to 60, kg | 0.76 ± 0.22 | 0.56 ± 0.19 | 0.476 | 0.034 | 0.689 |
| Pre-weaning | |||||
| Concentrate intake, g/db | 466 ± 47.3 | 374 ± 42.3 | 0.167 | < 0.001 | 0.579 |
| Milk intake, L/d | 6.57 ± 0.09 | 6.45 ± 0.08 | 0.212 | < 0.001 | 0.700 |
Values are presented as means ± SE.
n = 8 in CONT; n = 10 in 3-NOP group up to week 23, n = 9 for week 57 to 60.
aAverage daily gain, ADG.
bIntake of hay was not determined on an individual basis as it was offered to the entire group, concentrate intakes may reflect variability in hay intake in young ruminants.