| Variable | Treatment1 | SEM | p-value2 | |||
| SPF | WPF | Treat | S | Treat × S | ||
| Milk, kg∙day−1 | 26.6 | 26.2 | 0.36 | 0.38 | <0.01 | 0.99 |
| 4% FCM, kg∙day−1 | 26.3 | 25.2 | 0.40 | 0.04 | <0.01 | 0.70 |
| ECM, kg∙day−1 | 26.2 | 25.2 | 0.43 | 0.06 | <0.01 | 0.59 |
| Fat |
|
|
|
|
|
|
| % | 4.04 | 3.83 | 0.10 | 0.12 | <0.01 | 0.84 |
| Kg∙day−1 | 1.05 | 0.99 | 0.02 | 0.06 | <0.01 | 0.75 |
| Total protein |
|
|
|
|
|
|
| % | 3.32 | 3.32 | 0.03 | 0.92 | <0.01 | 0.90 |
| kg∙day−1 | 0.87 | 0.86 | 0.02 | 0.78 | <0.01 | 0.83 |
| Lactose, % | 5.04 | 5.03 | 0.02 | 0.66 | <0.01 | 0.47 |
| Urea, mg∙100ml−1 | 34.2 | 34.6 | 0.43 | 0.48 | <0.01 | 0.03 |