Abstract
The results of studies on the effect of the introduction of the amino acid tryptophan in the amount of 0.04 % in the composition of the combo feed and additionally in the diet of the feed mixture «Chondrotan» (on the physiological parameters and meat productivity of broiler chickens. The greatest effect on the hematological parameters of broilers was provided by tryptophan in combination with the feed mixture «Chondrotan» at the rate of 350 g per 1 ton of mixed feed. It was also revealed that the use of tryptophan and different amounts of «Chondrotan» feed mixture in the feeding of broiler chickens contributes to an increase, in comparison with the control, of the mass of the gutted carcass, respectively, by 2,07 (P<0,05); 5,24 (P<0,001) and 2,99 % (P<0,001), edible parts of the carcass-by 2,11 (P<0,05); 5,72 (P<0,001) and 3,14 % (P<0,001), pectoral muscles – by 2,17 (P<0,05); 5,63 (P<0,001) and 3,20 % (P<0,001). The quality indicators of meat are improving in the young animals of the experimental groups: the content of dry matter in the pectoral muscles – by 0,09; 0,15 (P<0,05) and 0,13 % (P<0,05), protein-by 0,12; 0,40 (P<0,01) and 0,19 % (P<0,05). Of the experimental groups, the highest indicators of meat yield and quality were noted in broilers of the II experimental group.
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