The Effects of Mannanoligosaccharide and Organic Zinc on Some Electrocardiographic and Haematologic Parameters in Broilers

This study was conducted to investigate the effects of mannanoligosaccharide (MOS) and organic zinc (Zn) supplementation on some electrocardiographic and hematologic parameters in broilers. A total of 60, Ross-308 one-day-old male broiler chickens were used. Chicks were divided into 1 control and 3 treated groups. The control group was fed a basal diet without supplements of MOS and organic Zn. In treated groups, MOS (1 g/kg), organic Zn (80 ppm) and MOS (1 g/kg) + organic Zn (80 ppm) were added into the basal diet. At the end of the 42-day treatment period, some electrocardiographic and haematological parameters were determined. The duration of T (P-T) wave and QT interval in MOS treatment group were significantly decreased (P 0.05) as compared with control. The durations of PR interval in organic Zn group and group supplemented with MOS + organic Zn was significantly higher as compared with control. The mean electrical axis in MOS group shifted leftward (-35.87°) in the frontal plane (P 0.05). The hematocrit values in MOS and organic Zn treatment groups were significantly lower (P 0.05) than in control and the H/L ratio in organic Zn group was significantly higher (P 0.05) than in control. The results showed that the supplementation of MOS and organic Zn to the diet of broilers resulted in marked effects on some electrocardiographic and haematological parameters.