Table 1.
Ingredient and nutrient composition of diets fed for 89 d before slaughter
| Dietary treatment | ||
|---|---|---|
| Control | Vitamin E1 | |
| Ingredient | % of diet DM | |
| Dry-rolled corn | 35 | 35 |
| Modified wet distillers grains2 | 35 | 35 |
| Corn silage | 20 | 20 |
| Control supplement3 | 10 | — |
| Vitamin E supplement4 | — | 10 |
| Analyzed nutrient content | % of diet DM | |
| CP, % | 14.61 | 14.72 |
| NDF, % | 26.39 | 26.32 |
| ADF, % | 10.03 | 10.19 |
| Fat, % | 4.82 | 4.88 |
| Calculated nutrient content5 | ||
| Vitamin E, IU/kg DM | 19.8 | 109.8 |
| S, % of diet DM | 0.31 | 0.31 |
| Cu, mg/kg DM | 9.32 | 9.31 |
| Mn, mg/kg DM | 43.54 | 43.51 |
| Se, mg/kg DM | 0.43 | 0.42 |
| Zn, mg/kg DM | 66.53 | 66.44 |
1Heifers were supplemented with no additional vitamin E in the diet (Cont) or 1,000 IU of vitamin E·heifer−1·d−1 (Vit E) for 89 d prior to slaughter.
2Modified wet distillers grains contained 8.5% fat.
3Supplement contained 75.4% ground corn, 22.7% limestone, 0.9% trace mineral salt (20% CaCO3, 15.43% Availa-4 Zinpro, 14.16% KCl, 8.75% MgO, 8.00% MnSO4, 6.74% FeSO4, 6.55% rice hulls mineral oil, 5.95% S prilled, 4.41% vitamin E, 1.50% Se, 1.03% MgSO4 and KSO4, 0.88% CuSO4, 0.22% vitamin A, 0.13% vitamin D3 500, 0.04% Ca(IO3)2, yielding 277 mg/kg Co, 5,000 mg/kg Cu, 250 mg/kg I, 20,200 mg/kg Fe, 30,000 mg/kg Mn, 150 mg/kg Se, 30,000 mg/kg Zn, 2,205 KIU/kg vitamin A, 662 KIU/kg vitamin D3, 22,000 IU/kg vitamin E), 0.8% liquid fat, 0.15% Rumensin 90 (200 g monensin/kg DM; Elanco Animal Health, Greenfield, IN), and 0.10% Tylan 40 (88 g tylosin/kg DM; Elanco Animal Health).
4Supplement contained 70.9% ground corn, 22.7% limestone, 4.5% vitamin E supplement (20,000 IU/kg dl-α-tocopheryl acetate; ADM Alliance Nutrition, Quincy, IL), 0.9% trace mineral salt, Rumensin 90 (200 g monensin/kg DM; Elanco Animal Health, Greenfield, IN), 0.10% Tylan 40 (88 g tylosin/kg DM; Elanco Animal Health).
5Nutrients were calculated using NRC values (NRC, 2000).