Table 2.
Dietary ingredient inclusion and analyzed nutritional composition of finishing diets containing tannic acid (ByPro1) fed to steers
| Finishing diet2 | |||
|---|---|---|---|
| Item | Control | 30-ByPro | 60-ByPro |
| Ingredient, % DM | |||
| Steam-flaked corn | 63.72 | 63.72 | 63.72 |
| Wet corn gluten feed (Sweet Bran3) | 20.00 | 20.00 | 20.00 |
| Alfalfa | 4.00 | 4.00 | 4.00 |
| Cottonseed hulls | 4.00 | 4.00 | 4.00 |
| Yellow grease | 3.00 | 3.00 | 3.00 |
| Supplement4 | 2.00 | 2.00 | 2.00 |
| Urea | 0.68 | 0.68 | 0.68 |
| Limestone | 1.60 | 1.60 | 1.60 |
| Premix5 | 1.00 | 1.00 | 1.00 |
| Analyzed composition,6 % DM | |||
| DM, % | 78.7 | 78.4 | 78.1 |
| CP | 13.5 | 13.2 | 13.6 |
| NDF | 20.8 | 22.3 | 21.1 |
| ADF | 11.9 | 12.3 | 11.4 |
| EE7 | 5.1 | 5.4 | 5.2 |
| Ash | 5.7 | 5.7 | 5.6 |
| Ca | 0.65 | 0.74 | 0.69 |
| P | 0.38 | 0.43 | 0.43 |
| K | 0.74 | 0.85 | 0.82 |
| S | 0.17 | 0.19 | 0.18 |
| NEm,8 Mcal/kg | 2.14 | 2.14 | 2.13 |
| NEg,8 Mcal/kg | 1.47 | 1.46 | 1.46 |
Silvateam USA, Ontario, CA.
30-ByPro = 30 g DM of ByPro/steer daily; 60-ByPro = 60 g DM of ByPro/steer daily.
Cargill Corn Milling, Blair, NE.
Supplement contained (DM basis) 67.7538% carrier (cottonseed meal), 0.5% antioxidant (Endox; Kemin Industries, Inc., Des Moines, IA), 3.76% urea, 10% potassium chloride, 15% sodium chloride, 0.0022% cobalt carbonate, 0.1965% copper sulfate, 0.0833% iron sulfate, 0.0031% ethylenediamine dihydroiodide, 0.167% manganous oxide, 0.125% selenium premix (0.2% Se), 0.9859% zinc sulfate, 0.0099% vitamin A (1,000,000 IU/g), and 0.157% vitamin E (500 IU/g) and provided (dietary) 30 mg/kg of monensin (0.75% Rumensin-90 in supplement; Elanco Animal Health, Indianapolis, IN) and 9 mg/kg of tylosin (0.5063% Tylan-40 in supplement; Elanco Animal Health).
Premix contained cottonseed meal for the control diet, 0.33% tannic acid (ByPro) for the 30-ByPro diet, and 0.66% tannic acid (ByPro) for the 60-Bypro diet. Cottonseed meal was used as the carrier for the ByPro premixes.
Analyzed composition from a commercial laboratory (Servi-Tech Laboratories, Amarillo, TX) with the exception of CP, which was analyzed using the Kjeldahl method.
EE = ether extract.
Calculated composition using tabular values (NRC, 1996).