The effect of phytase and organic mineral supplements in the amount of 2.5% of the accepted norms on the productivity of broiler chickens and indicators of the quality of the pectoral muscle

Abstract

In the FNC "VNITIP RAS", an experiment was carried out on broiler chickens of the cross breeding of the SGC "Smena 8". According to the principle of analogues, four groups of chickens were formed. The effect of an organic mineral supplement in the form of L-asparaginates (OMEC-broiler) in combination with and without phytase on broiler productivity and muscle tissue quality was studied. The results obtained show that the introduction of a complex of trace elements in the form of L-asparaginates in the amount of 2.5% of the guaranteed norms into the feed of broiler chickens has a positive effect on the metabolic processes of birds, contributing to an increase in live weight, with a similar average daily increase. At the same time, the feed costs per kg of gain for the experimental groups of chickens in comparison with the control group became less. The highest average daily increase in live weight for 5 weeks of broiler rearing was observed in chickens of the fourth group (56.31 g), who received feed without the inclusion of premixes (OR2), but with a content of 2.5% organic trace elements from the accepted norms and with the addition of phytase in the amount of 1 million units per ton. At the same time, there was a low feed conversion (1,652 kg/kg) and a productivity index (EPI) equal to 352.42 units. The indicators of the quality of muscle tissue, at the same time, remain at a good level.