Radionuclide Mineral Studies,: 3. The Effect of Breed and Dietary Zinc, Calcium, and Vitamin D3 on the Retention of Zinc65 in Chicks
Chicks were fed soybean protein- cerelose basal ration containing a tricalcium phosphate- calcium carbonate mineral mixture. Growth and general appearance were improved by the supplementation of Zn up to 30 ppm, and bone abnormalities and skin lesions were abolished by supplementation of 40 to 60 ppm of Zn. Breed differences were observed. The overall retention of Zn65 in the tibia was higher in the New Hampshire and New Hampshire x White Leghorn chicks than in White Leghorn and White Leghorn x New Hampshire chicks at 21 days of age. Liver Zn65 uptake was decreased steadily by increasing dietary Zn supplementation, tending to level off after 30 ppm added Zn. Addition of vitamin D3 to the D3-deficient basal diet decreased liver Zn65 uptake regardless of dietary Zn or Ca level. The presence of vitamin D3 increased the Zn65 content of the tibia when the diet contained 1.0% Ca, and decreased it in the presence of 1.6% Ca in both the Zn-adequate and deficient groups. Excess Ca in the intestine may effect the precipitation or removal of Zn via the feces since Ca source, level, and pH were shown to influence the removal of Zn65 from solution in vitro. Ca14 mineralization of the tibia was increased by vitamin D3 addition, and decreased by increasing the dietary Ca level.
- Research Organization:
- Univ. of West Virginia, Morgantown
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-021447
- OSTI ID:
- 4728164
- Journal Information:
- Poultry Science, Journal Name: Poultry Science Journal Issue: 4 Vol. 40; ISSN 0032-5791
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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