Table 1.
Composition of basal diets fed to weanling pigs during the experiment (as-fed basis)1
| Phase2 | ||||
|---|---|---|---|---|
| Item | I | II | III | IV |
| Ingredients, % | ||||
| Corn | 38.46 | 43.61 | 58.08 | 68.66 |
| Dried whey | 16.00 | 14.00 | 10.00 | 0.00 |
| Soybean meal, 48% | 10.00 | 18.00 | 26.00 | 27.05 |
| Spray-dried animal plasma | 6.00 | 3.00 | 0.00 | 0.00 |
| Soy protein concentrate3 | 5.00 | 3.00 | 0.00 | 0.00 |
| Select menhaden fish meal | 8.58 | 7.04 | 3.12 | 0.00 |
| Soybean oil | 3.00 | 3.00 | 0.00 | 0.00 |
| Fat, choice white grease | 0.00 | 0.00 | 0.00 | 0.94 |
| Lactose | 9.80 | 5.46 | 0.00 | 0.00 |
| Limestone | 0.26 | 0.19 | 0.91 | 1.12 |
| Dicalcium phosphate | 0.93 | 1.40 | 0.00 | 0.00 |
| Monocalcium phosphate | 0.00 | 0.00 | 0.82 | 1.17 |
| Zinc oxide | 0.42 | 0.42 | 0.00 | 0.00 |
| Mineral premix4 | 0.35 | 0.35 | 0.35 | 0.35 |
| Vitamin premix5 | 0.20 | 0.20 | 0.20 | 0.20 |
| Lysine-HCl | 0.52 | 0.18 | 0.32 | 0.31 |
| DL-Met | 0.48 | 0.08 | 0.07 | 0.06 |
| L-Thr | 0.00 | 0.07 | 0.14 | 0.14 |
| Calculated composition | ||||
| ME, Mcal/kg | 3.45 | 3.45 | 3.45 | 3.45 |
| SID lysine, % | 1.50 | 1.45 | 1.30 | 1.15 |
| Ca, % | 0.90 | 0.90 | 0.80 | 0.80 |
| Available P, % | 0.55 | 0.55 | 0.40 | 0.40 |
| Lactose, % | 21.00 | 14.00 | 7.00 | 0.00 |
| Analyzed composition, % | ||||
| Moisture | 11.14 | 10.59 | 12.22 | 14.67 |
| CP | 22.69 | 21.92 | 19.30 | 16.96 |
| Crude fat | 5.07 | 4.92 | 2.47 | 2.88 |
| Total dietary fiber | 8.06 | 8.53 | 9.71 | 11.24 |
| NDF | 6.10 | 6.50 | 7.39 | 7.09 |
| ADF | 2.21 | 1.98 | 2.62 | 2.73 |
| Total lysine | 1.89 | 1.63 | 1.40 | 1.12 |
1Diets were not supplemented with antibiotics.
2Phase I, II, III, and IV diets were fed to pigs for 7, 7, 14, and 28 d postweaning, respectively.
3Soycomil, Archer Daniels Midland Company, Decatur, IL.
4Provided as milligrams per kilogram of diet: sodium chloride, 3,000; zinc, 100 from zinc oxide; iron, 90 from iron sulfate; manganese, 20 from manganese oxide; copper, 8 from copper sulfate; iodine, 0.35 from calcium iodide; selenium, 0.30 from sodium selenite.
5Provided per kilogram of diet: retinyl acetate, 2,273 μg; cholecalciferol, 17 μg; DL-α-tocopheryl acetate, 88 mg; menadione sodium bisulfate complex, 4 mg; niacin, 33 mg; D-Ca-pantothenate, 24 mg; riboflavin, 9 mg; vitamin B12, 35 μg; choline chloride, 324 mg.