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Combined feeding of zinc, iodine and salt-free diet for inducing moult and its effect on subsequent performance of layer



Combined feeding of zinc, iodine and salt-free diet for inducing moult and its effect on subsequent performance of layer



Indian Journal of Poultry Science 29(2): 142-145



White Leghorn hens (300) of 67 weeks old were used for this study. A standard layer diet devoid of salt but supplemented with either 3750 ppm of iodine (SFI), 7500 ppm of zinc (SFZ) or 2500 ppm of iodine + 5000 ppm of zinc (SFIZ) and a standard diet supplemented with 3750 ppm of iodine + 7500 ppm of zinc (IZ) were compared against a control layer diet for inducing moult and subsequent performance. Results revealed significant decline in egg production in all the experimental groups during the 17 days moulting period, the effect being more pronounced in SFZ group. Body weight loss during moulting period and gain in weight during subsequent laying cycle were also highest in SFZ group followed by SFIZ, SFI and IZ groups. During the post-moult period, hen-housed egg production and feed efficiency were significantly higher in all the moulted groups compared to control with no difference among the moulted groups. Egg weight was significantly higher in IZ group followed by SFI group. Moulted groups were significantly superior to control for albumen index and Haugh unit score.

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