饮水中添加精油共晶对产蛋后期蛋鸡生产性能、蛋品质和脂质代谢的影响OA

This study was to investigate the effects of essential oil cocrystals on performance,egg quality,and lipid metabolism in late-phase laying hens.Ninety-six 60-week-old Hyline Brown laying hens were selected and randomly assigned to two groups:the control group received normal drinking water,while the experimental group received drinking water containing 30 mg/L of cocrystals of essential oil.Each group consisted of six replicates,with eight hens per replicate,and the experimental period lasted for four weeks.At the end of the experi-ment,performance,egg quality,serum biochemical indexes,organ indexes,and liver biochemical indexes were measured.Compared with the control group,essential oil cocrystals significantly increased laying rate,egg weight,and egg albumen height(P＜0.05)of the experi-mental group.However,there was no significant effect on eggshell strength,thickness,shape index,yolk color,or Haugh unit(P＞0.05)of the group.Moreover,the levels of triglyceride,total cholesterol,aspartate aminotransferase and alanine aminotransferase in the serum of the experimented hens were significantly reduced(P＜0.05).The supplementation of essential oil cocrystals to the drinking water of the experi-mental late-phase laying hens significantly reduced both their abdominal fat weight and percentage(P＜0.05),as well as hepatic triglyceride content(P＜0.05),which was further accompanied by the inhibition of hepatic peroxisome proliferator-activated receptor γ expression(P＜0.05)in the hens.This study suggested that supplementing 30 mg/L of essential oil cocrystals to the drinking water improved the laying rate,egg quality,and lipid metabolism in late-phase laying hens.