The Effect of Propolis Addition Into Laying Hen Diet on Performance, Serum Lipid Profile and Liver Fat Rate

Abstract The aim of this study was to evaluate the effect of propolis (P) on performance egg quality parameters, serum lipid profile, some liver enzymes and liver fat ratio.. 120 Lohmann (LSL) laying hens were divided into 5 groups and each group consisted of 6 subgroups. The control group was fed basal diet. The other groups were fed high-energy diets to induce fatty liver, and 0, 100, 200 and 300 mg/kg propolis were supplemented to high-energy feeds, respectively. During the eight-week trial, feed and water were given as adlibitum. It was determined that egg production and feed convertion ratio were decreased in the high-energy feed group without the addition of propolis. The highest egg production was found in HE + 100 mg/kg P and HE + 200 mg/kg P groups. It was found that liver fat ratio were higher in the group fed with HE + 0 mg/kg P feed (P < 0.01) than other groups. But the addition of P decreased the liver fat rate significantly. The highest VLDL, TG and LDL values were found for HE + 0 mg/kg P group. The addition of 200 mg/kg propolis to high-energy feed increased GSH, SOD, CAT and GPx values. Conclusion, high-energy feed adversely affected egg production and liver fat ratio, but the addition of 100 or 200 mg/kg propolis improved egg production and decreased liver fat ratio.