Interactions between cattle breed type and anabolic implant strategy impact circulating serum metabolites, feedlot performance, feeding behavior, carcass characteristics, and economic return in beef steers

• DOI: 10.1016/j.domaniend.2021.106633
• Publication Date: 2021-05-01T06:38:19Z
• Authors: Caleb C. Reichhardt; Ryan Feuz; Tevan J. Brady; Laura A. Motsinger; Reganne K. Briggs; Brett R. Bowman; Matthew D. Garcia; Ryan Larsen; Kara J. Thornton
• Keywords: Feedlot; Beef Cattle

Introducing Bos indicus (BI) genetics into a beef herd has the potential to increase environmental sustainability. When introducing BI genetics, there are concerns regarding negative impacts on temperament, growth, and carcass characteristics. Implants routinely used in United States, with majority of cattle feed receiving an anabolic implant improve growth efficiency, however research interaction between breed type implants is limited. This compared use influenced animals versus taurus feedlot setting. Twenty steers were stratified by initial weight 2 × factorial design examining two different breeds: Angus (AN; n = 10) or Santa Gertrudis (SG; 10), strategies: no (CON; combined containing 120 mg TBA 24 E2 (IMP; 10; Revalor-S, Merck Animal Health). We hypothesized that would performance animals. Steers randomly placed covered pens equipped GrowSafe bunks fed same ration for 129 d. weighed every 28 Dry matter intake, feeding behavior, data was collected. Blood collected harvested as serum d 0, 2, 10, after that, analyzed urea nitrogen (SUN), haptoglobin, 25HydroxyVitamin D. tended gain more (P 0.06) than SG, while IMP 0.10) CON treatment observed > 0.10). A when analyzing SUN 0.05) haptoglobin 0.02) concentrations. Serum 25HydroxyVitmain D concentrations be increased 0.09) SG-IMP SG-CON steers. have greater amounts marbling SG steers, had improved 0.04) yield grade. Economic return decreased $46 head implanting economic head. provides evidence suggesting may respond differently BT analyses demonstrate producers, decreases raised temperate climates.