Calcium Metabolism in Broiler Breeder Hens: 1. Calcium Status of the Digestive Tract of Broiler Breeders Throughout a 24-Hour Period

作者: M. FARMER , D.A. ROLAND , J. BRAKE , M.K. ECKMAN

DOI: 10.3382/PS.0620459

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摘要: Abstract Dry matter and calcium content of the digestive tract were determined on two groups broiler breeders during a 24-hr period. The individually caged hens fed either ad lib or restricted to 122 g feed 4-hr feeding period each day from 0700 1100 hr. received artificial light 2300 On Day 14 program total 100 hens, 10 group, necropsied at selected intervals (0700, 1100, 1900, 2300, 0300 hr), contents various segments feces collected analyzed for dry calcium. analysis also included any endogenous excretions and, therefore, absorption values are apparent. Hens per had only 51.7% 64.2% consumed remaining in By hr 20.6% 28.1% remained. approximately 14% (14.2 g) their intake 16% (.70 available with an average 171 day, 26% daily by Fifty-five percent 22% remained It was concluded that morning do not maintain constant equal metering crop into throughout

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