Effects of some managerial factors on the hatchability of poultry eggs
Abstract: The objective of this study was to investigate the effect of adding graded cholecalciferol (vitamin D3) levels to the layers diets, which was increased than control content of vitamin D3 (3000 IU/ kg diet) by about 10, 20 or 40 %, on productive performance, egg quality, reproductive performance and some physiological responses in both Mamourah and Sinai strains at different production periods.
In general, it could be concluded that, Sinai strain had the best significant values of egg production parameters; age at sexual maturity, entire egg production, eggshell quality, feed conversion and economic efficiency, while Mamourah one was superior in live body weight, egg weight, egg mass, hatching traits; fertility and hatchability, absolute and relative (%) chick weights at hatch and economic efficiency. It was observed that high vitamin D3 level (1200 IU/kg diet) achieved the highest value of all studied traits. It could be observed that the percentage of fertility and hatchability during middle laying stage seemed to be adequate to achieve the favorable results and would be economic.
Key Words (not more than 10): Cholecalciferol - vitamin D3 - egg production - productive performance - egg quality- reproductive- Hatching- hatchability.
Publication year 2007
Pages P. 315
Availability location مكتبة معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
Availability number 1036
Organization Name
Country Egypt
Author(s) from ARC
Agris Categories Animal husbandry
AGROVOC
TERMS		 Egg hatchability. Egg production. Eggs. Management. Performance testing. Reproductive performance. Vitamin d.
Proposed Agrovoc egg quality;
Publication Type PhD Thesis
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