枯草芽孢杆菌对育肥猪生长性能、免疫功能、肠道菌群和肉品质的影响

Effect of bacillus subtilis on growth performance,immune function,gut microbiota and meat quality of fattening pigs

文章旨在研究枯草芽孢杆菌对育肥猪生长性能、免疫功能、肠道菌群和肉品质的影响,试验将160头体重为(59.35±0.53)kg的育肥猪分成4组,每组4个重复,每个重复10头猪,对照组、添加Ⅰ组、添加Ⅱ组、添加Ⅲ组依次饲喂含0、500、1000、1500mg/kg枯草芽孢杆菌的基础日粮。结果显示,与对照组相比,3个枯草芽孢杆菌添加组对末重、平均日增重、料重比、IgA含量、IgG含量、芽孢杆菌数、大肠杆菌数均产生显著影响(P<0.05),枯草芽孢杆菌1000mg/kg添加组和1500mg/kg添加组对乳酸杆菌数、沙门氏菌数、pH_(24h)值、剪切力、蒸煮损失率、滴水损失率均产生显著影响(P<0.05),以1000mg/kg添加剂量的影响效果最佳。表明枯草芽孢杆菌能改善育肥猪的生长性能、免疫功能、肠道菌群和肉品质,1000mg/kg添加剂量的作用效果最优。

In order to study the effects of Bacillus subtilis on the growth performance,immune function,gut microbiota and meat quality of fattening pigs,160 fattening pigs(weighing 59.35±0.53 kg)were divided into 4 groups,with 40 pigs in each group,each group has 4 replicates,with 10 pigs in each replicate,the control group,addition groupⅠ,addition groupⅡ,and addition groupⅢwere sequentially fed with a basal diet containing 0 mg/kg,500 mg/kg,1000 mg/kg,and 1500 mg/kg Bacillus subtilis.The results showed that compared with the control group,the three Bacillus subtilis addition groups had significant effects on final weight,average daily weight gain,feed to weight ratio,IgA content,IgG content,Bacillus subtilis and Escherichia col(P<0.05).The 1000 mg/kg and 1500 mg/kg addition groups of Bacillus subtilis had significant effects on Lactobacillus,Salmonella,pH_(24 h) value,shear force,cooking loss rate and drip loss rate(P<0.05),the optimal effect is achieved by adding a dose of 1000 mg/kg.It indicated that Bacillus subtilis can improve the growth performance,immune function,gut microbiota and meat quality of fattening pigs,with the optimal effect achieved at a dosage of 1000 mg/kg.