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| Titel: |
Effect of 1α,25-dihydroxycholecalciferol on egg shell quality and egg production |
| Auteur: |
Tsang, C. P. W. Grunder, A. A. Soares, J. H. Narbaitz, R. |
| Verschenen in: |
British poultry science |
| Paginering: | Jaargang 31 (1990) nr. 2 pagina's 241-247 |
| Jaar: |
1990-06 |
| Inhoud: |
1. The effect of replacing dietary cholecalciferol (D3) by la,25-dihydroxycholecalciferol (1,25-(OH)2D3) on egg shell quality and egg production was tested on 32-week-old White Leghorn laying hens over 9 weeks. 2.Hens fed on a diet supplemented with 5 μg 1,25-(OH)2D3/kg diet, tended to lay more eggs, and the eggs had significantly higher specific gravity and percentage shell than eggs from control hens fed on a diet suplemented with 27-5 μg D3/kg diet. 3.The effect became apparent after about 4 weeks of treatment and persisted until the end of the test. 4.Hens fed on a diet without D3 supplement started to lay very thin or soft shelled eggs within 4 weeks, suggesting that the birds' reserves of D3 or its metabolites were depleted within this period. 5.The results suggest that 1,25-(OH)2D3 can be substituted for D3 in layer diets to improve egg shell quality. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 11 van 22 gevonden artikelen
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