不同酸化剂对断奶仔猪消化性能及肠道微生物菌群的影响

Effects of Different Acidifiers on Weanling Pigs′ Digestion and Microflora in Intestine

选用21日龄，平均体重为5．3±0．1kg的断奶仔猪72头，随机分成4个处理，每个处理6个重复，每个重复3头仔猪，研究比较了市场中几种不同酸化剂对断奶仔猪生产性能的影响。研究结果表明，日粮中使用酸化剂均显著地提高了断奶仔猪的日增重（P〈0．05），降低了腹泻指数（P〈0．05），其中以生物酸效果最好。使用生物酸和进口复合酸均促进了胃酸和胃蛋白酶的分泌（P〈0．05），提高了十二指肠内容物中胰蛋白酶和淀粉酶的活性（P〈0．05），显著地增加了乳酸杆菌的数量，降低了大肠杆菌数量（P〈0．05）。国产复合酸对上述指标没有显著影响。

The experiment was conducted to weanling pigs＇digestion and microflora in intestine investigate the effects of different acidifiers on Seventy - two 21 - d - old pigs, with an average body weight 5.3 ±0.1 kg, were randomly allotted into 4 treatments. There were 6 replicates per treatment, with 3 pigs per replicate. The results indicated that the averge daily gain （ADG） increased and diarrhea index decreased significantly （ P 〈 0.05） of pigs in acidifier treatments, among which the pigs in bio - aeidifier treatment was best. The secretion of acid and pepsin in stomach, with the trypsin and amylopsin in pancreatin, improved significantly （ P 〈 0.05） of the pigs both in bio -aeidifier and the imported compound aeidifier treatment. At the same time the lactobacillus count increased and eseherichia coil count decreased significantly （ P 〈 0.05） in duodenum of the pigs above. The homemade compound acidifier had no significant effect on the index above.