| Popis: |
Objective Pen and digestibility studies were conducted to analyze the effects of a high-energy programmed feeding protocol on nutrient digestibility, health, and performance of newly received growing cattle. Materials and Methods In Exp. 1, 354 heifers (initial BW = 214 ± 4 kg) consumed diets formulated to supply 0.99, 1.1, 1.21, or 1.32 Mcal of NEg/kg of DM, and each contained 40% Sweet Bran (Cargill Corn Milling, Blair, NE) on a DM basis. Treatments were offered to achieve 1.0 kg/d of ADG. In Exp. 2, 8 ruminally cannulated steers were used in a digestibility study using the diets from Exp. 1 in a 4 × 4 Latin rectangle design with 4 periods. Results and Discussion Morbidity and mortality rates were not different among treatments (P > 0.82) and nor was ADG (P ≥ 0.33). Dry matter intake decreased linearly (P 0.68) despite a linear decrease in average ruminal pH (P Implications and Applications In summary, these results indicate a high-energy programmed feeding protocol is more efficient than traditional lower-energy receiving diets based on roughages and does not negatively affect health or performance. |
