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The experiment was conducted to investigate the effects of coating breading eggs with different materials on the quality of stored eggs and hatching results. 400 fertile eggs were divided in a completely randomized design into five treatments, four replicates and each replicates contain 20 eggs. Experimental groups were following: 1) control (without coating egg), 2) coating egg with 50% solution of honey, 3) coating egg with % 50 solution of aqueous extract of propolis, 4) coating egg with 3% solution of gelatin, 5) coating egg with 50% solution of sugar. After testing, eggs stored for two weeks and then were transferred to the hatchery. In the end of the storage, egg quality traits (egg weight, sell weight, yolk weight, albumen weight, Haugh unit and albumen pH) and at the end of the incubation period, characteristics hatchability (hatchability, weight and length of newly hatched chicks) were assessed. The results showed, coating the eggs with different materials were improved egg weight, yolk weight, albumen weight, Haugh unit and albumen pH (p<0.05), whereas hadn't any significant effect on shell weight. Also, coating of eggs with mentioned materials had significantly reduced hatchability percentage than to control group (without coating egg) (p<0.05). But the effect of experimental groups hadn't any significant effect on the weight and length of the newly-hatched chicks. The results of this study showed, coating stored eggs with honey, propolis, gelatin and sugar can improve the quality traits of the broiler breeder eggs.

Effects of coating breeding eggs with different materials on quality of stored eggs and hatching results