Table 2.
Diet composition for phase 2 (days 14–28)
| Dietary treatment | |||
|---|---|---|---|
| Ingredients, % | Positive control | Novel Thr source | Negative control |
| Corn | 62.14 | 62.07 | 62.36 |
| Soybean meal | 30.76 | 30.76 | 30.76 |
| Monocalcium phosphate | 1.43 | 1.43 | 1.43 |
| Calcium carbonate | 0.90 | 0.90 | 0.90 |
| Salt | 0.45 | 0.45 | 0.45 |
| L-Lys | 0.55 | 0.55 | 0.55 |
| L-tryptophan | 0.04 | 0.04 | 0.04 |
| Soybean oil | 2.50 | 2.50 | 2.50 |
| VTM premixa | 0.50 | 0.50 | 0.50 |
| L-isoleucine | 0.06 | 0.06 | 0.06 |
| DL-methionine | 0.28 | 0.28 | 0.28 |
| Thr sourceb | 0.22 | 0.29 | – |
| L-valine | 0.17 | 0.17 | 0.17 |
| Total | 100.00 | 100.00 | 100.00 |
| Calculated composition | |||
| Metabolizable energy, Mcal/kg | 3.109 | 3.109 | 3.109 |
| Crude protein, % | 19.90 | 19.90 | 19.90 |
| Fat, % | 5.00 | 5.00 | 5.00 |
| Calcium, % | 0.70 | 0.70 | 0.70 |
| Available phosphorus, % | 0.37 | 0.37 | 0.37 |
| Sodium, % | 0.20 | 0.20 | 0.20 |
| SID Lys, % | 1.33 | 1.33 | 1.33 |
| SID Ile:Lys | 0.55 | 0.55 | 0.55 |
| SID Leu:Lys | 1.02 | 1.02 | 1.02 |
| SID M+C:Lys | 0.58 | 0.58 | 0.58 |
| SID Thr:Lys | 0.60 | 0.60 | 0.44 |
| SID Trp:Lys | 0.18 | 0.18 | 0.18 |
| SID Val:Lys | 0.67 | 0.67 | 0.67 |
Ingredients are listed as percentage of inclusion in the diet and reported on an “as-fed” basis.
aVitamin and trace mineral; provided 6,614 IU vitamin A, 827 IU vitamin D, 26 IU vitamin E, 2.6 mg vitamin K, 29.8 mg niacin, 16.5 mg pantothenic acid, 5.0 mg riboflavin, 0.023 mg vitamin B12, 165 mg Zn (zinc sulfate), 165 Fe (iron sulfate), 39 mg Mn (manganese sulfate), 17 mg Cu (copper sulfate), 0.3 mg I (calcium iodate), and 0.3 mg Se (sodium selenite) per kilogram of diet.
bL-Thr in positive control; ThrPro (CJ America Bio, Fort Dodge, IA) in novel Thr source.