Open Access
Table 3.
Correlation relationship of body weight and milk yield over 305 days of the first lactation of cows of different productivity levels
| Milk yield over 305 days of the first lactation: | Body weight, kg | ||||
|---|---|---|---|---|---|
| At birth | at 6 months | at 10 months | at 12 months | at 18 months | |
| Record cows | 0.09 | 0.10 | 0.14 | 0.11 | 0.18 |
| Highly productive cows | 0.06 | 0.06 | 0.09 | 0.10 | 0.18 |
| Production group | 0.03 | -0.02 | 0.02 | 0.04 | 0.14 |
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