Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (2): 275-284.DOI: 10.3969/j.issn.1004-1524.2023.02.04

• Animal Science • Previous Articles     Next Articles

Effects of dietary supplementation with compound probiotics on production performance, intestinal antioxidant capacity and intestinal ammonia nitrogen levels in late-phase laying hens

CHEN Xin1(), CI Wenjia1, LI Zhefeng2, CAI Pingli3, ZHU Jianjin1,*()   

  1. 1. School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
    2. Hangzhou King Technology Feed Co., Ltd., Hangzhou 311107, China
    3. Poultry Technical Guidance Station, Tongshan District, Xuzhou, Xuzhou 221100, Jiangsu, China
  • Received:2021-11-19 Online:2023-02-25 Published:2023-03-14
  • Contact: ZHU Jianjin

Abstract:

This study was aimed to investigate the effects of of dietary supplementation of Lactobacillus acidophilus and Bacillus subtilis on the performance and intestinal health of late-phase laying hens. A total of 2 160 Hy-Line brown hens (50-weeks-old) were randomly divided into three groups, the control group (NC group) was fed the basal diet and the experimental group was supplemented with 250 mg·kg-1 (LD group) and 500 mg·kg-1 (HD group) Lactobacillus acidophilus and Bacillus subtilis complexes on the basal diet. The results showed that compared with the NC group, the egg production rate increased by 2.62% and 2.20% in the LD and HD groups respectively and the average daily feed intake (ADFI) was significantly lower in the HD group (P<0.05) at the 49 d. Compared with the NC group, the activity of catalase (CAT) and glutathione peroxidase (GSH-Px) and total antioxidant capacity (T-AOC) in ileal tissue in the LD group were significantly higher than those in the NC group. Similarly, T-AOC, GSH-Px, CAT and SOD activities in cecum and ileum tissues were significantly increased (P<0.05) in the HD group. Significantly higher levels of acetic acid, n-valeric acid and isovaleric acid in cecum contents in the LD group (P<0.05), and significantly higher levels of acetic acid, propionic acid and n-butyric acid in the HD group (P<0.05) compared with the NC group. Ammonia nitrogen, urea content and relative activity of urease in the cecum contents were significantly lower (P<0.05) compared with the NC group. However, the levels of uric acid were higher (P<0.05) in the HD group compared with the NC group. The correlation between microbiome and ammonia metabolites showed that the relative abundance (Bacteroides, Clostridium, Ruminococcus, etc.) were significantly correlated with ammonia metabolites. In conclusion, dietary supplementation of Lactobacillus acidophilus and Bacillus subtilis can improve the antioxidant capacity of the intestine, increase the level of short-chain fatty acids in the intestinal contents and reduce the ammonia content in the intestinal contents for improving the performance of laying hens in the late egg-laying period.

Key words: probiotics, laying hen, production performance, gut health

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