Implant Strategies for Dairy Steers
نویسنده
چکیده
The availability of growth promotant options on the market today (Table 1) targeted to cattle ranging from young calves to growing and finishing steers provides dairy steer producers the flexibility of designing an implant strategy to meet their goals for an economic return for a specific market niche. Expectations in typical beef feed yards are for a return of $10 to $30 per dollar invested in growth promotants (Anderson, 2001). In an evaluation of 37 steer trials, Duckett et al. (1996) observed that implanted cattle increased daily gains 18%, feed intake 6%, feed efficiency 8%, carcass weight 5%, and rib-eye area 4% compared to those receiving no implants. Overall carcass traits and tenderness were not significantly affected negatively by implanting although implanted cattle had a 14.5% decrease in the percentage choice. The net return was $18.32 in cattle sold live and $13.53 on a grade and yield basis per implant investment, the latter being offset by decreases in choice grades. Guiroy et al. (2002) found that although anabolic implants improved the efficiency of absorbed energy, the finished body weight of steers to reach the same body composition as non-implanted increased from 30 to 90 lbs, depending on the implant strategy used. If producers decide that they will not use implants because of a specific market niche and consumer preference, then a premium of $30 to $60/steer will be necessary to make this option economical (Anderson, 1998).
منابع مشابه
Dairy Beef Implant Strategies: the Benefit of Tba-containing Implants for Holstein Steers
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Rates of growth and partitioning of nutrients among tissues were measured in large (Simmental x [Hereford x Brahman]; n = 34) and very large (Chianina x Angus and Maine Anjou x Angus; n = 37) steers implanted with different anabolic growth regulators. All cattle were fed individually a whole shelled corn (13% crude protein) diet. Implant strategies were: none (n = 13), Ralgro 36 mg (n = 15), Ra...
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We summarized experimental data to quantify the change in final BW due to a particular implant strategy when cattle are adjusted to the same final body composition. The database developed for this study included 13 implant trials involving a total of 13,640 animals (9,052 steers and 4,588 heifers). Fifteen different implant strategies were used among these trials, including no implant (control)...
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تاریخ انتشار 2004