抗生素对漏管猪回肠菌群及养分消化影响的研究

用 1 6头体重 1 8kg左右的去势漏管公猪 ,测定了乙酰螺旋霉素 ( 50mg/kg)、喹乙醇 ( 50mg/kg)和杆菌肽锌 ( 1 0 0mg/kg)对回肠菌群及物质代谢的影响。试验结果表明 :乙酰螺旋霉素可降低回肠乳酸杆菌量 ,增加大肠杆菌数量 (P <0 .0 5) ;提高回肠干物质消化率和粪中蛋白质消化率 (P <0 .0 5) ;提高蛋氨酸、苏氨酸、谷氨酸、丝氨酸和天门冬氨酸的回肠消化率 (P <0 .0 5)。喹乙醇可降低回肠大肠杆菌的数量 ,降低回肠pH值 (P <0 .0 5) ;提高粪干物质和蛋白质消化率 (P <0 .0 5) ;提高赖氨酸、蛋氨酸、脯氨酸、甘氨酸和丙氨酸的回肠消化率。杆菌肽锌可增加回肠乳酸杆菌的数量 ,降低大肠杆菌的数量 (P <0 .0 5) ;降低回肠pH值 (P <0 .0 5)。

Effect of Antibiotic on Ileam Bacteria Populations and Nutrients Digestibility of Fistula Pig

Trial was conducted with 16 gelding boar fitted with a“T”fistula(18kg).The pigs were allotted into 4 groups randomly.The control group was fed with basal diet of corn-soybean meal(B),the other 3 groups were fed with B+50 mg/kg Acetylspiramycini,B+50mg/kg Olaguindox and B+100mg/kg Bacitracin Zine separately.Acetylspiramycini made the quantity of lactobacilli and total bacteria reduced while E.coli.increased (P<0.05);DM in ileum and fecal protein digestibility increased (P<0.05) ;Digestibility of Thr,Glu,Ser and Asp in ileum increased (P<0.05).Olaguindox made the number of E.coli and ileum pH decreased (P<0.05);Fecal DM and protein digestibility increased (P<0.05);Ileum digestibility of Lys,Met,Pro,Gly and Ala increased (P<0.05).Bacteria Zine made the number of Lactobacilli increased and number of E.coli reduced (P<0.05); The ileum pH decreased.