China Animal Husbandry & Veterinary Medicine ›› 2025, Vol. 52 ›› Issue (8): 3574-3583.doi: 10.16431/j.cnki.1671-7236.2025.08.007

• Nutrition and Feed • Previous Articles    

Effect of Femented Tea on Laying Performance of Laying Hens After Forced Moulting

WANG Yuyan1, LI Menglin1, CAO Qingyun2, ZHOU Qiaoyi3, ZHANG Xingyue1, XIAO Yaqi1, HUANG Shirui1, ZHANG Zhiying1, HU Tiesheng4, SHI Dayou1   

  1. 1. College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China;
    2. College of Animal Science, South China Agricultural University, Guangzhou 510642, China;
    3. Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation and Utilization, Tea Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510620, China;
    4. Guizhou Hu Zhichao Agricultural Development Co., Ltd., Guiyang 550100, China
  • Received:2024-12-09 Published:2025-08-02

Abstract: 【Objective】 This study was conducted to explore the effects of different levels of fermented tea on laying performance of laying hens after forced moulting. 【Method】 480 Hy-Line Grey molted hens aged 695 days(moulting was initiated at 581 days) were randomly assigned to four groups,each with 8 replicates and 15 hens per replicate.The hens in control group were fed a basal diet,while in experimental groups Ⅰ,Ⅱ,and Ⅲ were fed the basal diet supplemented with 2%,4%,and 6% fermented tea,respectively.The testing phase was 42 d.During the trial,daily records were kept of egg rate,egg weight,and feed-egg ratio was calculated.On days 21 and 42 of the trial,egg,blood,and ovarian tissue samples were collected by replicate group to assess indicators related to egg quality,serum reproductive hormone levels,and ovarian antioxidant capacity. 【Result】 Compared with control group,①During days 0-21 of the trial, the laying rate of laying hens in experimental groups Ⅱ was significantly increased (P<0.05). During days 22-42 of the trial, the laying rate of laying hens in experimental group Ⅰ was significantly increased (P<0.05),and the feed-egg ratio of experimental groupⅠand groupⅡ was significantly decreased (P<0.05). ②On day 21 of the trial,the yolk ratio of eggs in experimental groups Ⅱ and Ⅲ was significantly decreased (P<0.05),and the eggshell thickness of eggs in experimental groups Ⅰ,Ⅱ,and Ⅲ were significantly decreased (P<0.05).On day 42 of the trial,the Haugh units of eggs in experimental groups Ⅰ,Ⅱ,and Ⅲ were significantly increased (P<0.05),the yolk ratio of eggs in group Ⅱ was significantly increased (P<0.05),and the eggshell thickness of eggs in experimental groups Ⅰ,Ⅱ,and Ⅲ were significantly decreased (P<0.05).③On day 21 of the trial,in the ovarian tissue,the activity of catalase (CAT) in experimental group Ⅲ was significantly decreased (P<0.05),and the total antioxidant capacity (T-AOC) in experimental groups Ⅱ and Ⅲ were significantly increased (P<0.05).On day 42 of the trial,in the ovarian tissue,the activity of glutathione peroxidase (GSH-Px) in experimental group Ⅱ was significantly increased (P<0.05).Meanwhile,the activity of CAT and T-AOC in experimental groups Ⅰ,Ⅱ,and Ⅲ were significantly increased (P<0.05).④On day 21 of the trial,serum progesterone (PROG) concentration in experimental group Ⅱ significantly was increased (P<0.05).On day 42 of the trial,serum concentrations of follicle-stimulating hormone (FSH),luteinizing hormone (LH),and PROG in group Ⅱ,and prolactin (PRL) in group Ⅲ were significantly increased (P<0.05). 【Conclusion】 Fermented tea supplements might improve laying performance,egg quality,ovarian antioxidant capacity,and serum reproductive hormone levels in laying hens after forced molting.The most effective results were observed at 4% fermented tea leaves supplementation.

Key words: tea; microbial solid-state fermentation; forced moulting; laying hens; laying performance

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