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Effect of different sources and supplemental levels of manganese on production performance and egg quality in the late stage of laying hens
R. Duan, Y. Q. Huang, H. Y. Wang, J. Chen; Xing Jia Bio-Engineering Co., LTD
R. Duan, Y. Q. Huang, H. Y. Wang, J. Chen; Xing Jia Bio-Engineering Co., LTD
Abstract
Experiment was carried out for evaluating the effect of different sources and levels of manganese on the production performance and egg quality of laying hens in the later stage. A total of 576 layers (Hy-Line Brown, 400-day-old) were randomly allocated to 4 treatments with 6 replicates per treatment and 24 birds per replicate.