Abstract
The results of physical, morphological, biochemical studies of hatching eggs of hens of the parent flock of the Czech Dominant cross are presented. The study was carried out in the conditions of the poultry farm of Krasnoye Podvorie farm in Belgorod region. For further analysis of the results of egg hatching and subsequent analysis of growth and development of the resulting chickens, a scientific experiment was carried out on the first seven days of growth and development. The experimental group of chickens received a probiotic feed additive starting from the first hours of life to normalize the microflora of the gastrointestinal tract, to increase survivability and productivity of farm animals. The additive contains Bacillus megaterium B-4801, Enterococcus faecium 1-35, in the amount of 0.5 kg per 1000 kg. The control group received only balanced feed of the ration . Evaluation of hatching eggs of the Czech Dominant cross at 72-week reproduction period showed that all morphological parameters of the eggs corresponded to appropriate values: egg weight - 61.94 g, shell weight - 7.09 g, shell thickness - 0.352 mm, egg density - 1.080 g / cm3. The concentration of vitamins and acid number of the yolk of hatching eggs also does not exceed the norms for hatching chicken eggs: vitamin A - 8.7, carotenoids - 15.0 μg / g, vitamin B2 - 9.6 μg / g, acid number of yolk - 4.05 mg KOH / g.
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