Effects of Glucuronolactone on Performance,Egg Quality,Plasma Biochemical Indices and Organ Development of Laying Hens during Post-Peak Period
The objective of this study was to evaluate the effects of dietary glucuronolactone on performance,egg quality,plasma biochemical indices and organ development of laying hens during post-peak period.Two hundred and forty 42-week-old Hy-Line brown laying hens with similar body weight and individual laying rate(higher than 90％)were randomly divided into 2 groups with 8 replicates per group and 15 hens per replicate.Hens in the control group were fed a basal diet,and others in the experimental group were fed the basal diet supplemented with 140 mg/kg glucuronolactone.The pre-feeding period was 1 week,and the formal period was 8 weeks.The results showed as follows:1)compared with the control group,the laying rate during weeks 5 to 8 and weeks 1 to 8 of the experimental group was significantly increased(P＜0.05),the broken and ab-normal egg rate during weeks 1 to 8 was significantly decreased(P＜0.05).2)Compared with the control group,the eggshell color brightness value of the experimental group was significantly decreased(P＜0.05),and the eggshell thickness was trend to increase(P=0.091).3)Compared with the control group,the plasma glutamyl transferase activity of the experimental group was significantly decreased(P＜0.05),the plasma as-partate transaminase activity was trend to decrease(P=0.079),and the plasma aspartate transaminase/alanine transaminase was trend to decrease(P=0.096).4)Compared with the control group,the ovary hierarchical follicle number of the experimental group was significantly increased(P＜0.05).In conclusion,dietary supple-mented with 140 mg/kg glucuronolactone can effectively alleviate the liver related enzyme activity in plasma and follicle development in ovary,which has an enhancement effect on the performance and eggshell quality of laying hens during post-peak period.[Chinese Journal of Animal Nutrition,2024,36(12):7669-7677]
万方数据
维普
