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The aim of this study was to investigate the effects of synbiotic supplementation, a potential alternative to antibiotic, on growth performance, carcass characteristics, meat quality, immunity, and oxidative status of Cherry Valley ducks. In total, 540 1-day-old male Cherry Valley ducks were randomly subjected to 3 treatments, and each treatment consisted of 6 replicates with 30 birds each. Birds in the 3 treatments were fed a basal diet devoid of antibiotics (control group) or a basal diet supplemented with either 40 mg/kg zinc bacitracin or 1.5 g/kg synbiotic composed of xylooligosaccharide, Clostridium butyricum , and Bacillus subtilis for 42 days. Compared with the control group, dietary synbiotic and antibiotic supplementation decreased the feed/gain ratio of ducks ( P =0.025) to a similar extent ( P &gt;0.05). Birds in the antibiotic group exhibited a lower average daily feed intake ( P =0.024) whereas such an effect was not observed in the birds of the synbiotic group ( P &gt;0.05). Synbiotic and antibiotic supplementation reduced abdominal fat yield ( P =0.032) and drip loss of the breast muscle ( P &lt;0.001) to similar extents ( P &gt;0.05). Additionally, synbiotic and antibiotic supplementation increased the relative weight of the bursa ( P =0.005) and total superoxide dismutase activity in the ileal mucosa ( P =0.025) to similar extents ( P &gt;0.05). Moreover, ileal malondialdehyde accumulation was reduced with the supplementation of synbiotic ( P =0.028), but not antibiotic. The results indicated that dietary synbiotic supplementation was beneficial for growth performance, carcass compositions, meat quality, immune function, and antioxidant capacity of Cherry Valley ducks, and it could be used as an alternative to antibiotics in Cherry Valley ducks.

journal of poultry science

Effects of Dietary Synbiotic Supplementation as an Alternative to Antibiotic on the Growth Performance, Carcass Characteristics, Meat Quality, Immunity, and Oxidative Status of Cherry Valley Ducks