Table 1 F-tests of fixed effects included in the model for productive/reproductive parameters and metabolic/endocrine variables and BCS of Holstein cows under grazing conditions in two commercial farms.
| Â | Farm 1 | Farm 2 | ||||
|---|---|---|---|---|---|---|
| Â | GH | IGF-I | dpp | GH | IGF-I | dpp |
Milk (L) | 0.43 | 0.25 | < 0.01 | 0.41 | 0.18 | < 0.01 |
FCM (L) | 0.54 | 0.24 | < 0.01 | 0.56 | 0.09 | < 0.01 |
Total solids (kg) | 0.50 | 0.23 | < 0.01 | 0.44 | 0.13 | < 0.01 |
Calving 1st service (days) | 0.26 | < 0.01 | - | 0.23 | 0.17 | - |
Service/conception | 0.74 | 0.68 | - | 0.45 | 0.90 | - |
Pregnancy rates | 0.97 | 0.96 | - | 0.80 | 0.97 | - |
BCS | 0.42 | 0.58 | 0.86 | 0.42 | 0.95 | < 0.01 |
BHB (mmol/L) | 0.31 | 0.01 | 0.09 | 0.86 | 0.77 | < 0.01 |
NEFA (mmol/L) | 0.01 | < 0.01 | 0.06 | 0.77 | 0.44 | < 0.01 |
Insulin (μUI/mL) | 0.99 | 0.02 | < 0.01 | 0.53 | 0.91 | < 0.01 |
IGF-I (ng/mL) | 0.09 | 0.34 | < 0.01 | 0.85 | 0.95 | < 0.01 |