Efficiency of using fodder meal of animal origin in the rearing of broiler chickens of the Ross-308 cross

Abstract

Studies on the effectiveness of the use of fodder meal of own production prepared from poultry waste as an ingredient of diets for feeding broiler chickens are presented. Scientific-economic and physiological experiments were carried out under production conditions in the Novosibirsk region in 2021, 2022. The object of the study were broiler chickens of the Ross-308 cross from 5 to 40 days of age. In the diet of the control group meat and bone meal in the amount of 5% of the diet structure was used, which in the two experimental groups was replaced by animal fodder meal of own production sterilized at different temperature regimes. In the 1st experimental group young animals consumed fodder meal sterilized at 135 °С, in the 2nd experimental group - at 150 ◦С. Sterilization was carried out in the boiler BC 10,000. The data obtained indicate that the live weight of broiler chickens was high in all groups, with the young birds of the control and 1st experimental groups significantly exceeded the 2nd experimental group by 3.1 and 2.6% (p <0.05) in terms of live weight. Energy of growth, keeping stock and feed expenses were close in all groups and were at the level of 71.1-73.4 g, 97.0-98.0% and 1.49-1.56 kg per 1 kg of growth respectively. Digestibility of crude protein and fat was high, differences between groups were insignificant. Digestibility of crude fiber was almost the same in the control and 1st experimental groups, in the 2nd experimental group it decreased by 1% relative to the control (p < 0.05). The maximum slaughter yield of meat (75.8%) was observed in the 1st experimental group, while in the control group this indicator was slightly lower (by 2.3%). In the 2nd experimental group, it was lower compared to the control and 1st experimental groups by 3.0 (p < 0.05) and 4.3% (p < 0.01), respectively. In the 2nd experimental group, the productivity index was lower compared to the other groups. Economic efficiency was high in all groups, but production efficiency increased by 16% when feed flour sterilized at 135 0C was fed to young animals.