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Effects of delayed implant protocols on performance, carcass characteristics and meat tenderness in Holstein steers

Strategies. Approximately 20 implants approved for use in cattleTremendous number of combinations possibleProducers need to establish strategies that best utilize the advantages of the different implants Long-fed cattle are particularly subjected to repetitive implant regimens. Effects. Increase

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Effects of delayed implant protocols on performance, carcass characteristics and meat tenderness in Holstein steers

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    1. Effects of delayed implant protocols on performance, carcass characteristics and meat tenderness in Holstein steers J. L. Beckett, and J. Algeo Cal Poly State University Algeo Consulting

    2. Strategies Approximately 20 implants approved for use in cattle Tremendous number of combinations possible Producers need to establish strategies that best utilize the advantages of the different implants Long-fed cattle are particularly subjected to repetitive implant regimens

    3. Effects Increase frame size Increases growth curve Decrease quality grade Lower % Choice Due to change in physiological endpoint Increases muscling Effect on tenderness?

    4. Implant Protocol

    5. Average Daily Gain

    6. Final Weight

    7. Gain to Feed

    8. Percentages of Holstein steer carcasses grading USDA Choice or better

    9. USDA Yield Grade

    10. Discussion Implants: Increased average daily gains, Improved feed efficiency Increased daily dry matter intake Heavier hot carcass weights Larger longissimus muscle area Early implants dramatically influence growth curves Aggressive estrogens suppressed marbling resulting in lower quality grades

    11. Project Summary Goal: Identify the time that implants can be initiated to: Capture maximal growth and performance Minimize detrimental effects on product 186 steers on feed for 280 d Initial weight 156 kg Weighed every 30 days

    12. Diet

    13. Average Finishing Ration Analysis Dry matter 84% Crude Protein 12.79% NEg 1.23 Mcal/kg NEm 1.95 Mcal/kg

    14. Experimental Protocol

    16. Final Weight

    17. Average Daily Gain

    18. Daily Dry Matter Intake

    19. Feed to Gain

    20. Longissimus Muscle Area

    21. Percentages of Holstein steer carcasses grading USDA Choice or better

    22. USDA Yield Grade

    24. Meat Ribs aged for 14 days 2 steaks from each rib were removed, individually vacuum packed Steaks sent to Colorado State University CSU measured tenderness (shear force) and conducted trained taste panel

    25. Warner-Bratzler Shear Force

    26. WB Shear Force over 5

    27. Trained Taste Panel

    28. Summary Early implants dramatically influence marbling at a given weight Delaying implants tend to improve marbling without significant effects on growth & efficiency Aggressive nature of implant strategy should complement the market Variations in tenderness can not be explained by the use of implants

    30. Percent Empty Body Fat

    31. Percent Empty Body Fat

    32. Adjusted Final Body Weight

    33. AFBW from nonimplanted Controls

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