Table 9.
Age and body measurements of cows and calves wintered on stockpiled “Tifton 85” bermudagrass receiving different rates of N fertilization, or on “Tifton 85” bermudagrass hay plus supplement during years 1 and 2
| Trait | Treatment1 | HAY | ||||||
|---|---|---|---|---|---|---|---|---|
| 56N | 112N | 168N | ||||||
| Yr 1 | Yr 2 | Yr 1 | Yr 2 | Yr 1 | Yr 2 | Yr 1 | Yr 2 | |
| Cow parameters | ||||||||
| Age, yr | 6.5 | 5.0 | 5.0 | 5.0 | 5.5 | 4.8 | 4.8 | 5.5 |
| Initial BW, kg | 670 | 641 | 620 | 612 | 705 | 641 | 638 | 634 |
| Initial BCS | 6.0 | 5.8 | 5.8 | 5.1 | 6.0 | 5.7 | 6.0 | 5.8 |
| Calf parameters | ||||||||
| Birth weight, kg | 45.5 | 39.3 | 41.3 | 42.0 | 43.7 | 38.5 | 46.9 | 40.8 |
| Initial BW, kg | 41.3 | 60.4 | 47.7 | 52.4 | 49.4 | 53.7 | 44.4 | 66.6 |
| Initial hip height, cm | 71.4 | 66.7 | 76.5 | 76.8 | 74.6 | 69.2 | 74.0 | 73.6 |
| Actual weaning weight, kg | 269 | 220 | 261 | 241 | 273 | 240 | 291 | 251 |
| Age at weaning, d | 212 | 202 | 215 | 207 | 213 | 203 | 224 | 203 |
156N = 56 kg N/ha; 112N = 112 kg N/ha; 168N = 168 kg N/ha; HAY = “Tifton 85” hay cut in.
August prior to stockpiling.