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Effect of dietary calcium level on egg production and shell quality in broiler breeder hens at peak production

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Author(s): J.Cassius Moreki, | Henning Jacobus van der Merwe | James Paul Hayes

Journal: Research Opinions in Animal & Veterinary Sciences
ISSN 2221-1896

Volume: 1;
Issue: 1;
Start page: 19;
Date: 2011;
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Keywords: Calcium' Egg production | Egg weight | Phosphorus | Eggshell quality | phosphorus

ABSTRACT
A study was conducted to evaluate the effects of dietary calcium levels on shell quality and egg production of Ross broiler breeder hens from 25 to 35 weeks of age of. One hundred and ninety eight Ross broiler breeder pullets were reared up to 22 weeks on restricted diets with 1.0, 1.5 and 2.0% Ca. The pullets in each experimental diet were further randomly divided into three treatments with 1.5, 2.5 and 3.5% dietary Ca (22 birds per treatment) in a 3 × 3 factorial arrangement. The feeds were isocaloric and isonitrogenous but differed only in the Ca and P contents. Feed intake was administered in accordance with Ross Breeders recommendations. Individual body weight measurements were taken on three weekly intervals for the duration of the experiment. Parameters evaluated included egg production, shell weight, shell percentage, SWUSA, egg contents, egg surface area and shell thickness. Dietary treatment had significant (P
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