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- W4237255363 abstract "Abstract Background The excessive use of antibiotics in the livestock feed industry caused inevitable side effects of microbial resistance. Besides this residual antibiotics in animal-derived foodstuff imposed serious health problems for humans. So this study aimed to investigate the potential use of Bacillus velezensis to substitute antibiotics for poultry production. A total of 468, 49-week-old Hy-Line Brown chickens, were randomly divided into four groups; the control group (regular diet), experiment group I (0.1% B. veleznesis ), experiment group II (0.2% B. veleznesis ), and antibiotic group (50 mg/kg flavomycin), with three replicates per group and trial period consisted on 42 days. Results The results showed that, compared with the control group, the average egg production rate and daily feed intake of experimental groups I and II increased significantly (P < 0.05), while the average egg weight was increased in experimental group II as compared to I. (P < 0.01). The feed conversion ratio was decreased (P > 0.05) in group II. Egg quality parameters such as yolk weight of the experimental group II was increased, but that of the antibiotic group and experiment group I was decreased, neither significant (P > 0.05). Moreover, the eggshell strength, yolk color, albumen height, and Haugh unit were significantly increased (P<0.05). Compared with the control group, probiotic groups can increase the progesterone and motilin (P > 0.05) but decrease the secretin and cholecystokinin in the blood plasma (P > 0.05). Conclusions This study suggested that B. velezensis can substitute in-feed-antibiotics and improved most of the study parameters significantly. Which suggested that B. velezensis has potential future application value to replace the feed antibiotics." @default.
- W4237255363 created "2022-05-12" @default.
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- W4237255363 date "2020-08-27" @default.
- W4237255363 modified "2023-09-27" @default.
- W4237255363 title "Effect of Bacillus velezensis to substitute in-feed antibiotics on the production, blood biochemistry and egg quality indices of laying hens" @default.
- W4237255363 doi "https://doi.org/10.21203/rs.3.rs-41376/v2" @default.
- W4237255363 hasPublicationYear "2020" @default.
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