Table 2.
Dietary ingredients and nutritional composition of steam-flaked corn-based finishing diets containing live yeast fed to natural-program beef steers
| Finishing diets | |||
|---|---|---|---|
| Item | Control | LY | HY |
| Ingredient, % DM | |||
| Steam-flaked corn | 62.35 | 62.35 | 62.35 |
| Wet corn gluten feed (sweet bran, cargill corn milling) | 20.00 | 20.00 | 20.00 |
| Corn silage | 10.00 | 10.00 | 10.00 |
| Sorghum silage | 2.50 | 2.50 | 2.50 |
| Supplementa | 2.00 | 2.00 | 2.00 |
| Limestone | 1.65 | 1.65 | 1.65 |
| Urea | 0.50 | 0.50 | 0.50 |
| Premixb | 1.00 | 1.00 | 1.00 |
| Analyzed compositionc, % DM | |||
| DM, % | 67.36 | 66.50 | 66.97 |
| CP | 14.71 | 14.58 | 14.94 |
| NDF | 18.39 | 19.60 | 19.79 |
| ADF | 5.90 | 6.14 | 6.33 |
| EE | 3.00 | 3.40 | 3.20 |
| Starch | 48.60 | 47.30 | 48.40 |
| NEm, Mcal/kgd | 1.96 | 1.98 | 1.96 |
| NEg, Mcal/kgd | 1.32 | 1.32 | 1.30 |
| Ca | 0.62 | 0.71 | 0.67 |
| P | 0.46 | 0.49 | 0.46 |
| K | 0.88 | 0.94 | 0.89 |
| S | 0.17 | 0.18 | 0.18 |
aSupplement composition described in Table 1.
bPremix contained cottonseed meal for control diet; 24.8% (DM basis) yeast commercial product (ABVista) for the LY diet; and 49.59% (DM basis) yeast commercial product for the HY diet. Cottonseed meal was used as a carrier for the yeast premixes. Inclusions were based on an expected DMI of 9.5 kg/d (CTL = 0; LY = 1.33; and HY = 2.66 g of live yeast per steer daily).
cAnalyzed composition from a commercial laboratory (Servi-Tech Laboratories, Amarillo, TX).
dCalculated from growth performance data (Vasconcelos and Galyean, 2008).