China Animal Husbandry & Veterinary Medicine ›› 2025, Vol. 52 ›› Issue (9): 4105-4113.doi: 10.16431/j.cnki.1671-7236.2025.09.009

• Nutrition and Feed • Previous Articles    

Effects of Dietary Bile Acids or Compound Essential Oils on Laying Performance and Lipid Metabolism of Hens During the Extended Laying Period

LIU Huiying1,2, GAO Libing2, LI Xiaomin3, LI Wei3, WANG Qiuju1, WANG Jing1,2   

  1. 1. College of Animal Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China;
    2. Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Laboratory of Quality & Safety Risk Assessment for Products on Feed-origin Risk Factor, Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    3. Beijing Huadu Yukou Poultry Industry Co., Ltd., Beijing 101200, China
  • Received:2025-01-17 Published:2025-08-29

Abstract: 【Objective】 This study was conducted to explore the effects of dietary bile acids or compound essential oils supplementation in the diets on the performance,egg quality and lipid metabolism of hens during the extended laying period,specifically from 81 to 89 weeks of age,in order to improve lipid metabolism of hens during the extended laying period through nutritional regulation. 【Method】 A total of 180 healthy 80-week-old Jinghong laying hens were randomly divided into 3 groups with 5 replicates of 12 chickens each.Hens in control group were provided basal diets,in the bile acids group were supplemented with 250 mg/kg bile acids in the basal diet,and in the compound essential oils group were supplemented with 90 mg/kg compound essential oils in the basal diet.All hens were fed basal diets for a 1-week adaptation followed by an 8-week experimental period.The egg production was recorded every day,and the feed accounts were settled weekly.At the end of weeks 0,4 and 8,egg quality was determined.At the end of week 8,blood samples were collected from 2 laying hens in each replicate to determine the serum lipid metabolism related indexes.Then,the laying hens were slaughtered to measure the liver lipid metabolism related index,the activity of enzymes related to lipid metabolism in the ileum and the gene expression. 【Result】 Compared with the control group,①Neither supplementation of bile acids or compound essential oils had effect on the laying performance (P>0.05),at the end of week 8,egg yolk color score in the bile acids group were higher than those in the control group (P<0.05).② Both supplementation of bile acids and compound essential oils decreased the contents of serum triglycerides,cholesterol and low-density lipoprotein cholesterol,and the triglyceride content in the liver (P<0.05),and increased the high-density lipoprotein cholesterol content in the liver of laying hens (P<0.05).Adding bile acids also reduced the content of low-density lipoprotein cholesterol in the liver of laying hens (P<0.05).Both supplementation of bile acids and compound essential oils increased the ileal lipase activity and expression levels of small peptide transfer carrier (PepT-1) (P<0.05). Expression of atty acid binding protein (FABP-1) was also increased by bile acids supplementation (P<0.05). 【Conclusion】 Dietary supplementation of bile acids and compound essential oils could regulate intestinal lipid absorption and improve lipid metabolism of hens during the extended laying period.

Key words: hens in extended period; bile acids; compound essential oils; lipid metabolism

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