Table 1. Feed formulation for the Italian ryegrass experiment for finisher pigs
| Ingredients | Control | IRG2.5 | IRG5 |
| Corn | 77.96 | 75.07 | 72.16 |
| SBM | 18.00 | 18.00 | 18.00 |
| IRG | ND | 2.50 | 5.00 |
| Tallow | 1.00 | 1.50 | 2.00 |
| DCP | 1.30 | 1.25 | 1.20 |
| Limestone | 0.80 | 0.75 | 0.70 |
| Lys | 0.27 | 0.26 | 0.26 |
| Met | 0.01 | 0.01 | 0.02 |
| Thr | 0.06 | 0.06 | 0.06 |
| Salt | 0.30 | 0.30 | 0.30 |
| Vit-min premix1) | 0.30 | 0.30 | 0.30 |
| Calculated value | | | |
| Gross energy | 3,848 | 3,842 | 3,835 |
| Metabolizable energy | 3,348 | 3,326 | 3,303 |
| Crude fiber | 2.73 | 3.66 | 4.59 |
| Ether extract | 3.91 | 4.32 | 4.73 |
| Ash | 2.16 | 2.37 | 2.57 |
| NDF | 8.87 | 10.36 | 11.84 |
| ADF | 3.44 | 4.48 | 5.51 |
| Crude protein | 14.63 | 14.62 | 14.62 |
| Lys | 0.9 | 0.9 | 0.9 |
| Met | 0.26 | 0.26 | 0.26 |
| Met+Cys | 0.52 | 0.51 | 0.51 |
| Ca/P | 1.23 | 1.21 | 1.22 |
Vitamin-Mineral premix provided the following nutrients per kg: Vitamin A, 15,000 IU; Vitamin D3, 2850 IU; Vitamin E, 75 IU; Vitamin K3, 4.5 mg; Vitamin B1, 3.375 mg; Vitamin B2, 7.5 mg; Vitamin B6, 4.875 mg; Vitamin B12, 56.250 mg; Calcium D-Pantothenate, 25.5; Endox, 18 mg; Niacin, 48 mg; Folic acid, 1.875; Iodine, 0.6 mg; Iron, 150 mg; Magnesium, 54 mg; Zinc, 90 mg; Copper, 39 mg; Biotin, 0.45 mg.
SBM, soybean meal; IRG, Italian ryegrass; ND, not detected; DCP, di-calcium phosphate; Lys, lysine; Thr, threonine; NDF, neutral detergent fiber; ADF, acid detergent fiber; Met, methionine; Cys, cysteine.