Open Access
Table 2.
Productive longevity of cows of different lines
| Line | n | Duration of use, lactations | Life-long milk yield, kg | Fat, % | Yield per 1 day of lactation |
|---|---|---|---|---|---|
| Idial | 201 | 3.4 ± 0.13 | 16210 ± 727 | 3.80 ± 0.01 | 16.13 ± 0.14 |
| Sovering | 90 | 3.5 ± 0.19 | 16742 ± 1101 | 3.80 ± 0.02 | 16.58 ± 0.23 |
| Cheftain | 82 | 3.5 ± 0.22 | 15585 ± 1119 | 3.80 ± 0.02 | 16.06 ± 0.22 |
| Rokit | 41 | 3.0 ± 0.27 | 13543 ± 1267 | 3.89 ± 0.04 | 16.11 ± 0.31 |
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