芽孢杆菌制剂对断奶仔猪生长性能、免疫器官指数及胃肠道pH值的影响

试验在断奶仔猪日粮中添加不同比例的芽孢杆菌制剂,研究其对断奶仔猪生长性能、免疫器官指数及胃肠道pH值的影响。选择35日龄断奶仔猪96头,按性别比例一致的原则,随机分为4个处理,每个处理3个重复,每个重复8头仔猪,每个重复为1栏。对照组饲喂基础日粮,试验Ⅰ、Ⅱ、Ⅲ组在基础日粮中分别添加0.75%1、.5%、3%的芽孢杆菌制剂(即日粮中含有的活菌数为0.66×1010、1.32×1010、2.64×1010 cfu/kg),试验期35 d。结果显示:0.75%芽孢杆菌制剂组与对照组相比,平均日增重有提高的趋势,但差异不显著(P>0.05);胸腺器官指数,以0.75%芽孢杆菌制剂组显著高于对照组(P<0.05);空肠和盲肠pH值以0.75%芽孢杆菌制剂组显著低于对照组(P<0.05)。试验表明:在断奶仔猪日粮中添加芽孢杆菌制剂具有促进仔猪生长,降低胃肠道pH值,增强免疫器官指数的趋势。

Effect of bacillus preparation on growth performance and immune organ index and gastrointestinal pH value in weaning piglets

This experiment was conducted to investigate the effects of bacillus preparation on growth performance,immune organ index,gastrointestinal pH of weaning piglets.ninety six 35 day-old weaning piglets,consistent with the sex ratio,were randomly divided into 4 groups,with 3 replications per group and 8 piglets each replication.piglets in control group were fed basal diet.The trailⅠ,Ⅱ,Ⅲgroups were fed basal diet supplemented with 0.75%,1.5%,3% bacillus preparation,respectively.(per kg of diet contained 0.66×1010,1.32×1010,2.64×1010 cfu).The experiment lasted for 35 d.The results showed that the average daily gain was improved in 0.75% group in compared with the control group,but the difference was not significant(P>0.05);thymus organ index in 0.75% group was significantly higher than the control group(P<0.05);jejunum and cecum fermentation pH were significantly lower in 0.75% group as compared with the control group(P<0.05).It was conclude that supplementation of bacillus preparation in weaning piglets could improve growth,reduce gastrointestinal pH and enhance the immune organ index.