Performance and carcass characteristics of feedlot steers: effects of delayed implanting and programmed feeding during the growing period
Scaglia, G.; Greene, L.W.; McCollum, F.T.I.I.I.; Cole, N.A.; Montgomery, T.H.
Professional Animal Scientist 20(2): 162-169
ISSN/ISBN: 1525-318X DOI: 10.15232/s1080-7446(15)31291-2
This experiment was conducted to determine the effect of programming the rate of gain and delaying the first implant in feedlot steers on feedlot performance and carcass characteristics. Ninety-six growing steers (269+or-16.2 kg) were assigned to 12 pens in a completely randomized design. Treatments were implant (Synovex-SReg.; 20 mg estradiol benzoate and 200 mg progesterone; Fort Dodge Animal Health, Overland Park, KS) on d 1 or no implant and programmed feeding to gain at a slow (0.68 kg/d) or fast (1.14 kg/d) rate during the growing period; these treatments were randomly assigned (n=8) to pens of steers in a 2x2 factorial arrangement.