The use of alternative feed protein from Musca domestica larvae in poultry

Abstract

The results of numerous studies indicate that the biomass of Musca domestica larvae has great potential for use as a feed protein in animal husbandry. However, the issues of increasing the content of raw protein and improving the amino acid composition in the biomass of larvae remain open and require additional research. In addition, the study of the infl uence of such protein on the physiological and productive performance of broiler chickens has of scientifi c and practical interest. The purpose of the work was to develop a method for obtaining an alternative feed protein with an increased content of raw protein and improved amino acid composition. The larvae of Musca domestica have been used as a biological object of research, and chicken droppings have been used as a substrate. In order to conduct research a special insectarium has been equipped, in which the air temperature has been maintained at a stable level of 28–30 °C and a relative humidity of 60–70 %. Insects havebeen kept in special stationary cages. As a result of research, it has been found that the concentration of selenium and cobalt 15 mg/kg in the substrate is optimal for obtaining an alternative feed protein with an increased protein content and improved amino acid composition. The infl uence of microelements in the substrate composition on the chemical composition of the biomass of Musca domestica larvae has been revealed. The dynamics of the amino acid composition of the larval biomass has been studied using the proposed substrate. It has been found that the maximum content of many of the studied amino acids in comparison with the control was achieved after 48 hours of cultivation of larvae on the substrate with the addition of Se 15 mg/kg + Co 15 mg/kg. The maximum amount of lysine, phenylalanine, leucine+isoleucine, tyrosine was achieved after 48 hours, and histidine, valine, threonine, serine after 72 hours of cultivation. In addition, it has been found that the maximum concentration of raw protein was 61,72 % after 72 hours of cultivation. It has been found that the use of alternative feed protein from Musca domestica larvae in the feeding of cross Cobb 500 broiler chickens contributes to the improvement of physiological and productive parameters of the poultry. The revealed reduction in unit costs and increase in the gain of live weight of broilers leads to the decrease in prime-cost by 46 % and the increase in margin income by 149 %, and the level of profi tability by 110 %.