EFFECT OF FUNCTIONAL FEED ADDITIVE ON GROWTH RATES OF MEAT CHICKENS
Application of functional feed products - synbiotics in feeding young poultry can significantly improve mixed feed efficiency. The scientific-economic experiment to study the influence of feeding dry synbiotic «Synbiosorb-2» with functional properties in complete mixed feed for fattening broiler chickens was performed in the conditions of the poultry farm «Kuban», ZAO (close joint-stock company) Agrofirm «Agro-complex» of Ust’-Labinsky District in Krasnodar region. By random sampling method four groups of day-old chicken-broilers Аrbоr Ashe of 60 birds each were selected for the experiment. The first group of birds was control, chicks of the second group consumed complete mixed feed adding synbiotic at a dose of 0.05% by feed weight, the third - 0.1%, the fourth - 0,15%. The studies found that the best dosage of synbiotic «Synbiosorb-2» for mixed feeds was 0.1%. It was found that the use of the studied feed additive contributed to the increase in live weight of broiler chickens at the end of fattening by 7%. The young animals’ feeding 0.1% of the functional product provided 100% survival of chickens that was 3.3% higher than the control, adding to the complete mixed feed 0.15% of synbiotic increased this index by 1.6%. Slaughter yield of birds’ carcasses in the third group was greater in the test groups by 1,2-1,3%. The yield of all studied muscles (pectoral, drum, and thigh) was 2.7% higher in the second group, in the third - 7.2%, in the fourth - 4.8%. Feeding synbiotic in composition of the complete mixed feed improved the development of poultry’s internal organs and hematological indices. The profitability level of broiler chickens’ growing for meat using in their mixed feed synbiotic «Synbiosorb-2» increased in the second group by 0.9%, in the third - 6.9%, in the fourth - 2.5%. Due to the research findings, it is recommended to add to broiler chickens’ complete mixed feed synbiotic «Synbiosorb-2» at a dose of 0.01% by feed weight during the whole fattening period.