Использование жиров различного происхождения в комбикормах для бройлеров

Abstract

Purpose. Determination of the effectiveness of using fats of various origins in compound feed for broiler chickens. Materials and Мethods. A scientific and economic experiment was carried out on 4 groups of broiler chickens of the Cobb-500 cross at the Verkhnevolzhskaya Poultry Farm (Russia, Tver region). The poultry-rearing period was 37 days. Broilers in the control group received the main diet according to the growing phases; for chickens in the experimental groups, part of the sunflower oil in the diet was replaced with animal feed fat "Olisa": in group 2 – 0.5% in CCF Rost, 1.0% in Finish-1 and Finish- 2; in group 3 – 1.0% in CCF Rost, 1.5% in Finish-1 and Finish-2; in group 4 – 1.5% in CCF Rost, 2.0% in Finish-1 and Finish-2. The dynamics of live weight were recorded by weekly control weighing of broiler chickens. The safety of the poultry population was determined by counting dead birds. The absolute and average daily gain in live weight, the cost of feed per 1 kg of gain in live weight, the productivity index and other indicators were also determined during the growing process. Results. The introduction of 1.5% animal feed fat “Olisa” into the compound feed instead of part of the sunflower oil in CCF Rost and 2.0% in Finish-1 and Finish-2 contributed to an increase in both the average daily and absolute gain in live weight. The latter indicator was higher in broiler chickens of the fourth experimental group by 8.6% compared to the control group. Poultry from the same group had a higher meat yield per 1 m2 of floor area. Their productivity index was higher than in the control group by 6.6%. At the same time, the safety of poultry population in all groups participating in the experiment was high. Conclusion. Replacing part of the sunflower oil in feed with animal fat in the optimal dosage contributes to obtain high live weight, daily gain, safety of broiler chickens and productivity index.