Table 1.
Basal diet composition1
| Dry rolled corn | 52.0 |
| Dried distillers grains with solubles | 22.0 |
| Corn silage | 20.0 |
| Vitamin/mineral supplement2 | 6.0 |
| Nutrient composition | |
| NEm, Mcal/kg | 1.98 |
| NEg, Mcal/kg | 1.35 |
| NDF, % | 21.37 |
| Calcium, % | 1.15 |
| Phosphorus, % | 0.39 |
| Magnesium, % | 0.18 |
| Potassium, % | 0.82 |
| Sulfur, % | 0.24 |
1Treatments were 1) a diet with no arginine or lysine supplementation (CON), 2) rumen-protected arginine (16% metabolizable arginine, Ajinomoto Heartland, Chicago, IL) top-dressed at 63 g/steer daily (ARG), 3) rumen-protected lysine (25% metabolizable lysine, AjiPro-L, Ajinomoto Heartland) top-dressed at 40 g/steer daily (LYS), and 4) a diet with both arginine and lysine top-dressed at 63 and 40 g/steer daily, respectively (ARG + LYS).
2Vitamin/mineral pre-mix contained (DM basis): 18.25% Ca, 0.44% Mg, 1.32% K, 0.18% S, 3.43 ppm Co, 183.33 ppm Cu, 9.66 ppm I, 522.90 ppm Fe, 440.41 ppm Mn, 4.48 ppm Se, 563.91 ppm Zn, 42.19 IU/g vitamin A, 4.98 IU/g vitamin D, 0.155 IU/g vitamin E, 413.6 ppm monensin (Rumensin 80, Elanco Animal Health, Indianapolis, IN).