| Item | Prepartuma | Lactation |
|---|
| CTR | OVR |
|---|
| Ingredient, % of DM |
| Corn silage | 35.5 | 35.8 | 30.5 |
| Alfalfa silage | | 13.3 | 18.6 |
| Alfalfa hay | 17.2 | 9.5 | 2.0 |
| Wheat straw, chopped | 31.8 | | |
| Cottonseed | | 5.1 | 9.5 |
| Corn grain, ground | 3.6 | 17.9 | 20.7 |
| Soybean meal, 48% CP | 5.1 | 6.6 | 6.0 |
| Soybean meal, expeller | 4.1 | | 4.0 |
| Soy hulls | | 10.4 | 3.0 |
| Wheat middlings | | | 3.0 |
| Vitamin and mineral mixb | 0.3 | 0.3 | 0.3 |
| Salt | 0.3 | 0.2 | 0.2 |
| Dicalcium phosphate | 0.1 | 0.1 | 0.1 |
| Sodium bicarbonate | | | 0.9 |
| Limestone | 0.8 | | 1.0 |
| Magnesium oxide | | | 0.1 |
| Magnesium sulfate | 0.3 | 0.2 | 0.1 |
| Vitamin Ac | 0.1 | 0.1 | 0.1 |
| Vitamin Dd | 0.1 | 0.1 | 0.1 |
| Vitamin Ee | 0.2 | 0.1 | 0.1 |
| Urea | 0.9 | 0.2 | |
| Nutrient contentf |
| % DM | 54.1 | 53.2 | 53.3 |
| CP, % of DM | 14.2 | 15.0 | 17.1 |
| ADF, % of DM | 24.7 | 26.5 | 23.0 |
| NDF, % of DM | 51.9 | 38.6 | 35.4 |
| NEL, Mcal/kg of DM | 1.21 | 1.63 | 1.69 |
- aDiets were fed to cows from −42 d relative to expected parturition to parturition
- bContained a minimum of 5.0% Mg, 10.0% S, 7.5% K, 2.0% Fe, 3.0% Zn, 3.0% Mn, 5,000 mg/kg Cu, 250 mg/kg I, 40 mg/kg Co, 150 mg/kg Se, 2,200,000 IU/kg of vitamin A, 660,000 IU/kg of vitamin D3, and 22,000 IU/kg of vitamin E
- cContained 30,000 kIU/kg
- dContained 5,009 kIU/kg
- eContained 44,000 IU/kg
- fNutrient composition based on 4-week feed ingredient composites
