Impact of Feed Restricted System and Zinc Forms on Some Productive Performance Traits, Egg Quality Parameters and Economic Efficiency of Mandarah Laying Hens.
Abstract:This study was conducted to determine the effect of feeding different level of restricted feed with different forms of zinc(Zn) on productive performance, egg quality traits and economic efficiency of Mandarah (Egyptian local developed strain) laying hens. A total number of 270 laying hens + 27 cocks, 24 weeks old were randomly taken to be similar in (1228.0 ±44.0 g) in the study. Birds were randomly divided into nine experimental groups,(30 hens + 3 cocks in each group) and each group was contained three repl… Show more
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