Effect of zinc chelate on slaughter and liver morphology of quail

Abstract

The inclusion of zinc chelate complex in the diet has a positive effect on meat productivity. There is an increase in the mass of the carcass, internal organs, and a slaughter yield increases. The largest 37-day mass of the carcass was detected in the 2nd experimental group (Biocinc 0,2 mL/kg), it was 79,87 ± 7,69 g (р ≤ 0,001), thereby the slaughter yield was 74,4 %, which is 16,6% more than in the control group. The largest weight of 98-day carcass was noted in quail of the 2nd test group (Biocinc 0,2 ml/kg), which was 215,56 ± 8,67 g (р ≤ 0,001), which is 69,91 g more than in the control group. The kill yield was 76,3 %, which is 9,9 % more than in the control group. The largest increase in absolute liver weight in 37-day quail was observed with the use of Biocinc at a dose of 0,2 mL/kg – 3,74 ± 0,33 g, relative weight – 3,05 %. 98-day quail – 5,52 ± 0,28 g and 1,95 % when using Biocinc at a dose of 0,2 mL/kg. Vascular changes in the liver have been identified that affect the vessels of all calibers: from the central veins to the sinusoids. This manifests in vasodilation in the control group and vasoconstriction in the experimental quail groups. A decrease in the diameter of the central vein and the width of the sinusoid capillaries indicates an increase in the tone of the vascular wall due to an increase in the contractility of the muscular membrane under the influence of Biocinc. The lowest nuclear cytoplasmic ratio is observed in 2 and 3 experimental groups (0,38) when Biocinc is included in the diet at a dose of 0,2 and 0,3 mL/kg, which is manifested by the highest functional state of hepatocytes.