The Influence of Levels and Sources of Calcium and Vitamin D3 on the Biological Half-life of Ca45 in the Chick
S>Studies in White Leghorn cockerels showed that the biologicai half life of Ca45 in vitamin D3-adequate chicks red 1.2% Ca diets was 36 days. The biological half life was increased by reducing the dietary vitamin D3 and/or Ca level and decreased by raising the dietary vitamin D3 and/ or Ca level. The variation is dependent on the change in each dietary constituent and is not additive when both the dietary level of vitamin D3 and Ca are changed. The dietary source of Ca as tested by Ca carbonate, lactate, gluconate, and sulfate appears to have a different availability or absorption rate to the bird but not sufficient to produce a significant change in the biological half life of Ca45. No significant differences were observed in the residual tibia Ca45 from chicks fed the different Ca salts until after 21 days of age. At 28 days, however, the difference in the retained Ca45 between the chicks fed adequate vitamin D3 and their deficient counterparts became apparent. At this age, chicks receiving Ca lactate did not show the same degree of Ca45 turnover between vitamin D3-adequate and deficient chicks that was shown by the other Ca groups; the difference was st run. Concent 0.5%. Between 14 and 28 days of age, the chicks fed Ca sulfate without vitamin D3 showed essentially no change in the Ca45 the Ca45 concentration was observed. This was also true of the chicks receiving Ca carbonate and gluconate.
- Research Organization:
- West Virginia Univ., Morgantown
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-023058
- OSTI ID:
- 4692296
- Journal Information:
- Poultry Science, Journal Name: Poultry Science Journal Issue: 6 Vol. 41; ISSN 0032-5791
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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