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- W4296713773 abstract "Our objective was to evaluate the effect of supplement type fed during the pre-finishing growth phase of grazing Nellore bulls on gain performance during the subsequent finishing phase, either in confinement or on pasture. During the pre-finishing growth phase, bulls were grazed on pastures of Urochloa brizantha cv. Marandu. Bulls were supplemented with 1 of 4 supplements: (1) ad libitum mineral mixture (MM), (2) ground corn (GC), (3) GC with soybean meal (SBM), or (4) GC with dried distillers grain (DDGM). All supplements were administered at 3 g/kg of body weight (BW) on a dry matter (DM) basis. Eighty bulls were distributed in a completely randomized, 4 × 2 factorial arrangement, with 4 pre-finishing supplementation treatments (MM, GC, SBM, or DDGM) and 2 finishing systems (pasture or confinement). Ten cattle from each postweaning treatment were kept on pasture (n = 3 paddocks/treatment), and 10 bulls were housed in confinement pens (n = 3 pens/treatment). Bulls finished on pasture were offered a concentrate supplement consisting of 337.6 g/kg dried distillers grain (DDG), 611.2 g/kg GC, and 56.1 g/kg MM. The final diets offered in the confinement system consisted of 300 g/kg corn silage, 427.8 g/kg GC, 263.3 g/kg DDG, and 35.8 g/kg MM (DM basis). During the finishing phase, bulls that received GC and DDGM in pasture consumed more CP than bulls in the confinement system ( P = 0.001). Nutrient digestibility was greater among the bulls in pasture than those in confinement ( P ≤ 0.001), likely because of the lower proportion of NDF consumed by bulls that expressed selective grazing behavior ( P = 0.001). Daily weight gain was affected by pre-finishing history ( P = 0.03) and finishing system ( P ≤ 0.001) and was lower after SBM supplementation for bulls on pasture ( P = 0.009). The final BW ( P ≤ 0.001), hot carcass weight ( P = 0.005), and fat thickness ( P ≤ 0.001) were greater in bulls finished in confinement, but carcass yield was greater in bulls from pasture ( P ≤ 0.001). Preweaning supplementation affected the intake of nutrients in Nellore bulls finished on pasture postweaning but did not affect the intake of bulls finished in a confinement feedlot. Supplementation with DDGM in the preweaning phase (3 g/kg of BW) did not affect animal performance or carcass traits in either finishing system. Therefore, it is an option for replacing conventional supplements." @default.
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- W4296713773 date "2022-10-01" @default.
- W4296713773 modified "2023-10-18" @default.
- W4296713773 title "Effects of supplement type during the pre-finishing growth phase on subsequent performance of Nellore bulls finished in confinement or on tropical pasture" @default.
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- W4296713773 doi "https://doi.org/10.15232/aas.2022-02284" @default.
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