有机酸化剂对断奶仔猪生长性能和肠道健康的影响

本研究旨在探讨不同有机酸化剂组合对断奶仔猪生长性能、腹泻率及肠道微生物菌群的影响.试验采用单因子随机区组试验设计,选用540头28日龄平均体重为(8.23±0.40) kg的断奶“长×大”二元杂交仔猪,随机分成6个组,每个组6个重复,每个重复15头猪.对照组饲喂基础饲粮,有机酸化剂组(Ⅰ、Ⅱ、Ⅲ、Ⅳ和Ⅴ组)在基础饲粮中分别添加0.3％的有机酸化剂A、有机酸化剂B+C、有机酸化剂A+C、有机酸化剂A+仙人掌提取物(CE)、有机酸化剂A+C+CE.试验全期28 d.结果表明:在试验全期,与对照组相比,添加有机酸化剂A和B+C极显著提高仔猪平均日增重(P＜0.01).添加有机酸化剂A、A+CE和A+C+CE显著改善仔猪料重比(P＜0.05或P＜0.01)；与对照组比较,添加有机酸化剂A、B+C、A+C均可显著(P＜0.05)或极显著(P＜0.01)降低腹泻率；各组有机酸化剂对大肠杆菌和产气英膜杆菌均有显著(P＜0.05)或极显著(P＜0.01)抑制作用.在38和45日龄时,添加有机酸化剂A、B+C和A+C对金色葡萄球菌均有显著(P＜0.05)或极显著(P＜0.01)抑制作用.在35、38和45日龄时,对照组与各有机酸化剂组间乳酸杆菌数量无显著差异(P＞0.05).上述结果提示,在仔猪饲粮中添加有机酸化剂A和B+C组合能够有效地改善断奶仔猪的生长性能和肠道健康,降低肠道有害菌总数.

Effects of Dietary Organic Acids on Growth Performance and Gut Health of Weaner Piglets

This experiment was conducted to explore the effects of different combination of organic acids on growth performance,diarrhea rate and microbial population in weaner piglets.A total of 540 crossed-bred(Landrace×Yorkshine) piglets with an average initial body weight of(8.23±0.40) kg were randomly allotted to 6 groups with 6 replicates and 15 piglets with each replicate.The piglets in the control group were fed with a corn-soybean meal basal diet without any acidifier addition and the other piglets in the five exprimental groups were fed the same basal diet supplemented with one of five organic acids at the level of 0.3% [I: organic acid A;II: organic acid B+C;III: organic acid A+C;IV: organic acid A+cactus extract(CE);V: organic acid A+ C +CE,respectively].The formal experiment lasted for 28 days.Results showed as follow: during the whole experimental stage,compared with the control group,piglets fed diets containing organic acid A and B+C had greater average daily gain(P<0.01),and organic acid A,A+CE and A+C+CE supplementation significantly decreased feed/gain(P<0.05 or P<0.01).In addition,organic acid A,B+C and A+C supplementation groups exhibited lower diarrhea rate than the control group(P<0.05 or P<0.01),and showed positive effect of organic acids on diarrhea inhibition.Furthermore,organic acid supplementation resulted in decreased population of E.coli and C.perfringens in the feces(P<0.05 or P<0.01).At 38 and 45 days of age,organic acid A,B+C and A+C supplementation significantly inhibited S.aureus population in the feces(P<0.05 or P<0.01).However,compared with the control group,there was no difference in Lactobacilli population in organic acid supplementation groups(P>0.05).In conclusion,organic acids supplementation can improve the growth performance,feed utilization and gut health in weaner piglets,as evidenced by the reduced detrimental microbial population.And in the current experiment,organic acid A and B+C supplementation exhibit the best results.