Table 1.
Ingredients, calculated, and analyzed compositions of experimental diets 1 (as-fed basis, percentage (%), unless otherwise stated).
| Ingredients | Phases | |||
|---|---|---|---|---|
| Starter (0–14 d) | Grower (15–28 d) | |||
| Control Diet | Antibiotic Diet | Control Diet | Antibiotic Diet | |
| Ingredient Composition | ||||
| Corn (ground) | 51.08 | 50.98 | 45.36 | 45.25 |
| Soybean meal-46.5 | 41.44 | 41.45 | 36.31 | 36.33 |
| Wheat | - | - | 10 | 10 |
| Animal/vegetable fat | 2.93 | 2.97 | 4.22 | 4.26 |
| Limestone | 1.80 | 1.80 | 1.65 | 1.65 |
| Dicalcium Phosphate | 1.24 | 1.24 | 1.06 | 1.06 |
| DL Methionine premix 2 | 0.59 | 0.59 | 0.53 | 0.53 |
| Vitamin/Mineral Premix 3,4 | 0.50 | 0.50 | 0.50 | 0.50 |
| Salt | 0.41 | 0.41 | 0.37 | 0.37 |
| Lysine HCl | 0.01 | 0.01 | 0.00 | 0.00 |
| BMD 110G 5 | - | 0.05 | - | 0.05 |
| Total | 100 | 100 | 100 | 100 |
| Nutrient | Calculated composition | |||
| Metabolizable energy (kcal/kg) | 3000 | 3000 | 3100 | 3100 |
| Crude protein | 23 | 23 | 21.5 | 21.5 |
| Calcium | 0.96 | 0.96 | 0.87 | 0.87 |
| Available phosphorus | 0.48 | 0.48 | 0.44 | 0.44 |
| Sodium | 0.19 | 0.19 | 0.18 | 0.18 |
| Digestible lysine | 1.28 | 1.28 | 1.15 | 1.16 |
| Digestible methionine + cysteine | 0.95 | 0.95 | 0.87 | 0.87 |
| Digestible Tryptophan | 0.25 | 0.25 | 0.23 | 0.23 |
| Digestible Threonine | 0.89 | 0.89 | 0.82 | 0.82 |
| Analyzed composition | ||||
| Dry Matter | 90.7 | 90.8 | 93.2 | 93.5 |
| Crude protein | 24.8 | 25 | 22.5 | 23.8 |
| Crude fat | 5.50 | 5.79 | 6.84 | 6.85 |
| Calcium | 1.06 | 1.13 | 1.00 | 0.96 |
| Potassium | 1.14 | 1.16 | 0.99 | 1.04 |
| Phosphorus | 0.69 | 0.70 | 0.67 | 0.62 |
| Sodium | 0.19 | 0.21 | 0.21 | 0.16 |
1 Basal diet (NC); antibiotic diet containing NC + 0.05% bacitracin methylene disalicylate (BMD). 2 Supplied/kg premix: DL-Methionine, 0.5 kg; wheat middling, 0.5 kg. 3 Starter vitamin-mineral premix contained the following per kg of diet: 9750 IU vitamin A; 2000 IU vitamin D3; 25 IU vitamin E; 2.97 mg vitamin K; 7.6 mg riboflavin; 13.5 mg Dl Ca-pantothenate; 0.012 mg vitamin B12; 29.7 mg niacin; 1.0 mg folic acid, 801 mg choline; 0.3 mg biotin; 4.9 mg pyridoxine; 2.9 mg thiamine; 70.2 mg manganese; 80.0 mg zinc; 25 mg copper; 0.15 mg selenium; 50 mg ethoxyquin; 1543 mg wheat middling’s; 500 mg ground limestone. 4 Grower and Finisher vitamin-mineral premix contained the following per kg of diet: 9750 IU vitamin A; 2000 IU vitamin D3; 25 IU vitamin E; 2.97 mg vitamin K; 7.6 mg riboflavin; 13.5 mg Dl Ca-pantothenate; 0.012 mg vitamin B12; 29.7 mg niacin; 1.0 mg folic acid, 801 mg choline; 0.3 mg biotin; 4.9 mg pyridoxine; 2.9 mg thiamine; 70.2 mg manganese; 80.0 mg zinc; 25 mg copper; 0.15 mg selenium; 50 mg ethoxyquin; 1543 mg wheat middling’s; 500 mg ground limestone. 5 Bacitracin methylene disalicylate (providing 55 mg/kg mixed feed); Alpharma, Inc., Fort Lee, NJ, USA.