Using an enzyme preparation and vitamin C to increase the meat productivity of broiler chickens

Purpose: to study the effect of vitamin C and MEK Feedbest®VGPro when introduced into the compound feed of broiler chickens with excessive background of heavy metals on the indices of meat productivity, food and biological value, ecological safety of their meat. Materials and methods. The objects of the study were meat chickens of the ROSS-508 cross. At the age of one day, 4 groups of 100 birds each were formed from them in accordance with the principle of analog groups. In the composition of the used recipes of complete compound feed in all three age periods of growing, the main grain and protein ingredients were represented by locally produced feed: corn, wheat, peas and rapeseed meal. Growing of experimental broilers for meat was completed at the age of 42 days and their control slaughter was carried out, for which 5 birds were selected from each group. The concentration of salts of heavy metals was determined in the samples of feed and meat of the experimental birds. Results. The experiment substantiated the feasibility of combined introduction of MEC Feedbest®VGPro at a rate of 100 g/t of feed and vitamin C at a rate of 500 g/t of feed into diets with excessive content of heavy metal salts. Compared to the control analogues, broilers of the 3rd experimental group showed a reliable (p<0,05) decrease in fat by 0,26 % and a simultaneous increase in dry matter, protein and the value of the protein-quality indicator in the pectoral muscle samples. Combined additions of the tested preparations contributed to a decrease in the concentration of zinc by 63,17 % (p<0,05), cadmium by 61,11 % (p<0,05) and lead by 62,34 % (p<0,05) in poultry meat samples from the 3rd experimental group, compared to the control. Moreover, in the meat samples of broilers of the 3rd experimental group, the maximum permissible concentrations of none of these elements were exceeded.