Table 2.
Diet formulation (DM basis) and dietary nutrients of experimental diets containing 0, 7.5, and 15% crude glycerin, with or without 0.3% salt fed to finishing heifers (Exp. 3)
| Item | Treatments1 | ||||
|---|---|---|---|---|---|
| CON | LCG | LCGNS | HCG | HCGNS | |
| Ingredient, % | |||||
| Corn silage | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 |
| Dry-rolled corn | 31.0 | 21.9 | 22.3 | 12.9 | 13.3 |
| Corn gluten feed | 35.0 | 35.0 | 35.0 | 35.0 | 35.0 |
| Soybean hulls | 20.0 | 20.0 | 20.0 | 20.0 | 20.0 |
| Soybean meal | 0 | 1.6 | 1.5 | 3.1 | 3.0 |
| Limestone | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 |
| Mineral-vitamin premix2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Feed additive premix3,4 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 |
| Crude glycerin5 | 0 | 7.5 | 7.5 | 15.0 | 15.0 |
| Salt | 0.3 | 0.3 | 0.0 | 0.3 | 0.0 |
| Nutrient composition, % | |||||
| DM | 65.4 | 65.1 | 64.9 | 65.2 | 65.0 |
| CP | 14.3 | 14.4 | 14.4 | 14.2 | 14.1 |
| NDF | 39.9 | 36.2 | 36.6 | 35.4 | 35.9 |
| Na | 0.12 | 0.37 | 0.23 | 0.56 | 0.41 |
1CON = Control diet, without crude glycerin, LCG = 7.5% added crude glycerin and 0.3% added salt (DM basis), LCGNS = 7.5% added crude glycerin and no salt (DM basis), HCG = 15% added crude glycerin and 0.3% added salt (DM basis), HCGNS = 15% added crude glycerin and no salt (DM basis).
2Formulated to provide 0.1 mg/kg Co; 10 mg/kg Cu; 0.6 mg/kg I; 60 mg/kg Mn; 0.25 mg/kg Se; 60 mg/kg Zn; 2,200 IU/kg of vitamin A; and 22 IU/kg vitamin E in the total diet DM.
3Formulated to provide 300 mg monensin (Rumensin, Elanco Animal Health, Greenfield, IN), 90 mg tylosin (Tylan, Elanco Animal Health, Greenfield, IN), and 0.4 mg melengestrol acetate (Pfizer Animal Health, Exton, PA) per heifer daily.
4Contained Zilpaterol hydrochloride (Merk Animal Health, Summit, NJ) to provide 90 mg per heifer daily, followed by a 3-d withdrawal before harvest.
5Crude glycerin composition: 81.5% glycerol, 13.3% water, 6.3% ash, 2.5% Na, and <0.02% methanol.