Efficiency of floor rearing of broiler chickens of different crosses under the conditions of the increased rate of stocking

The work aimed to study zootechnical and economic indicators of floor rearing of broilers of "Ross-308" and "Hubbard F-15 White" crosses at increased rate of stocking in the winter period. It was found out that at the age of 40 days old, broilers of "Ross-308" were 4.2% superior to "Hubbard - F-15". Total output of the live weight gain of the broilers "Ross-308" was 6.5% higher than that of "Hubbard F-15 White" cross. The feed costs per 1 kg of live weight gain in "Ross-308" chickens was lower by 2.8% compared to the cross "Hubbard F-15 White". The productivity index of the broilers "Ross-308" was 30 units higher than that of "Hubbard F-15 White". It was also noted that the carcasses of "Ross-308" were better preserved and they were of better quality. The carcasses of "Ross-308" had the best meat qualities. The yield of edible parts in the carcasses of "Ross-308" was 80.71%, compared to 80.29% in the cross "Hubbard F-15 White". Hematological parameters of the broilers of cross "Ross-308" testify to metabolic processes and protein metabolism activation, as well as increase of natural resistance of a bird organism in comparison with the analogues of cross "Hubbard F-15 White". The broilers of "Ross-308" adapted better to floor rearing with the increased rate of stocking in the winter period. The production inspection confirmed the results of the experiment. By the increased rate of stocking, the yield of meat from 1 m² of floor and the gross volume of the sold products significantly increased. The profitability of thу production and sales of meat of "Ross-308", grown at an increased rate of stocking, is 1.64% higher than that of broilers of the same cross kept at the standard rate of stocking - 18 heads/m². The lowest level of profitability was from the broilers of "Hubbard F-15 White" broiler breed under the conditions of the increased rate of stocking - 7.08%.