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Effects of supplementary water-administered vitamin D3 on egg shell thickness


, : Effects of supplementary water-administered vitamin D3 on egg shell thickness. Poultry Science 62(6): 1120-1122

A total of 77 672 White Leghorn pullets, 22 weeks old, were divided equally into a control and a test group, and all of the hens were fed on a commercial layer diet containing (for the test group) cholecalciferol 5478 international chick units (ICU)/kg. The vitamin was provided once weekly for 32 weeks added to drinking water at 4111 ICU/litre. All the hens were then moulted. The effect of cholecalciferol on egg shell thickness was studied about every month for 1 laying year.

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Accession: 001072165

DOI: 10.3382/ps.0621120

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