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The evaluation of next-generation probiotics on broiler growth performance,gut morphology,gut microbiome,nutrient digestibility,in addition to enzyme production of Bacillus *** vitro

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Animal Nutrition 2024年第3期18卷 133-144页

作者： Jacoba I.Bromfield Shahram Niknafs Xiaojing Chen juhani von hellens Darwin Horyanto Baode Sun Lei Yu Viet Hai Tran Marta Navarro Eugeni Roura Bioproton Pty Ltd Acacia RidgeBrisbaneQueenslandAustralia Centre for Nutrition and Food Sciences Queensland Alliance for Agriculture and Food InnovationThe University of QueenslandBrisbaneQueenslandAustralia Centre for Animal Science Queensland Alliance for Agriculture and Food InnovationThe University of QueenslandBrisbaneQueenslandAustralia

Considerable research has been conducted into the efficacy of individual probiotics in broiler production,however information on the most effective combinations of synergistic Bacillus probiotic is *** study investigated the impact of different Bacillus strain combinations in broiler chickens,as well as in vitro enzyme *** experiment one,a total of 576 Ross 308 broilers at 1 d old were grown for 21 d across 6 treatments of maize-soybean diets(n=12 pens per treatment)to compare three different strain combinations(formulation 1[F1]:3 strains Bacillus amyloliquefaciens;F2:Bacillus coagulans and 2 strains ***;F3:***,Bacillus licheniformis and 2 strains ***;F5:Bacillus subtilis,*** and 2 strains ***),positive control(PC),and a negative control antibiotic treatment group(NC).In Exp.2,a total of 360 one-day-old ROSS308 broilers were used to test five treatments(n=9)including PC,NC,F1 and F5(selected from Exp.1),and F4(Bacillus pumilis and 2 strains ***)in a maize-soybean *** F1 demonstrated a significant improvement in feed conversion ratio(FCR)compared to F2 at d 14(1.49 vs 2.10;P=0.038)and the body weight(BW)at d 21(847.0 g vs 787.4 g)compared to other combinations(P=0.027).The FCR at d 21 tended to be lower in birds fed F1(1.46 vs 1.66)compared to the control(P=0.068).Probiotic treatments had significantly improved nutrient digestibility compared to the PC and ***,probiotic treatments supported the growth of Streptococcus,a common commensal genus and reduced the abundance of genera that correlated with low weight gain such as *** two revealed that F4 improved FCR(P<0.001)and BW at 28 d(P=0.014).In vitro testing showed a high production of protease and amylase by ***,the addition of Bacillus probiotics,particularly containing *** strains and Bacillus pumilus,into the diet of broiler chickens improves

关键词： Broiler Probiotic Bacillus Gut health Microbial profile

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