Table 3.
Statistics of traits recorded in the two experimental farms.
| Trait ‡ | Unit | Galle Heifers (n = 252) | Borculo Heifers (n = 74) | ||||
|---|---|---|---|---|---|---|---|
| Mean | SD * | CV † | Mean | SD * | CV † | ||
| Start age | d | 678 | 6 | 1% | 665 | 21 | 3% |
| Start weight | kg | 499 | 44 | 9% | 495 | 49 | 10% |
| Organic matter digestibility | 0.723 | 0.017 | 2% | 0.605 | 0.015 | 2% | |
| BW | kg | 534 | 46 | 9% | 508 | 49 | 10% |
| DMI | kg/d | 8.75 | 1.31 | 15% | 7.89 | 0.87 | 11% |
| ADG | g/d | 932 | 163 | 18% | 360 | 180 | 50% |
| Spot measures per day | 3.4 | 0.9 | 26% | 3.2 | 0.5 | 15% | |
| Total number of measures | 220 | 59 | 27% | 232 | 39 | 17% | |
| Visit duration | min:s | 3:39 | 0:12 | 6% | 4:01 | 0:19 | 8% |
| CH4 | g/d | 205 | 20 | 10% | 206 | 17 | 8% |
| CO2 | g/d | 6918 | 544 | 8% | 6139 | 411 | 7% |
‡ See Table 1 for description of traits; * standard deviation of traits adjusted for contemporary group effects; † CV of residual traits = SD * divided by the non-adjusted variable mean.