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Asian Journal of Animal and Veterinary Advances
Year: 2016  |  Volume: 11  |  Issue: 9  |  Page No.: 570 - 575

Effects of Dietary Manganese Supplementation on Laying Performance, Egg Quality and Antioxidant Status in Laying Ducks

A.M. Fouad, Y. Li, W. Chen, D. Ruan, S. Wang, W. Xie, Y.C. Lin and C.T. Zheng    

Abstract: Objective: Manganese (Mn) is a crucial trace element for poultry nutrition because it has multiple physiological functions. Thus, the main goal of this study was to evaluate the effects of dietary Mn supplementation on laying performance, egg quality and antioxidant status in Shanma laying ducks. Methodology: Five hundred and four Shanma laying ducks, at 17 weeks of age, were randomly assigned to 7 treatments, with 6 replicates per treatment and 12 ducks per replicate. Birds were fed the same basal diet, which was supplemented with 0.0 (control), 15, 30, 45, 60, 75 or 90 mg Mn/kg in the form of Mn-sulfate. Results: Results showed that dietary Mn supplementation did not affect egg production, egg weight, feed conversion ratio, egg mass, egg quality, tibia characteristics, total antioxidant capacity, copper-zinc superoxide dismutase or lipid peroxidation (malondialdehyde), but supplementing 90 mg Mn/kg diet significantly (p<0.05) improved the activities of total superoxide dismutase, Mn-containing superoxide dismutase and increased Mn content in egg yolk compared with the control group. Conclusion: These results indicate that corn-soybean meal diet containing sufficient amount of Mn for laying performance and egg quality in Shanma laying ducks under the conditions of current experiment, but adding 90 mg Mn/kg basal diet is required to improve the activities of Mn-containing superoxide dismutase and total superoxide dismutase and elevate Mn content in their egg yolk.

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