不同酸化剂对断奶仔猪生长、免疫性能和微生物菌群的影响

文章旨在评估日粮添加不同酸化剂对断奶仔猪生长性能、免疫性能和微生物菌群的影响.试验将384头平均初始体重为(6.16±0.23)kg的21?d断奶仔猪随机分为4组,每组6个重复,每个重复16头,各组断奶仔猪分别饲喂基础日粮、基础日粮+45?mg/kg抗菌肽、基础日粮+4?kg/T柠檬酸及基础日粮+3?kg/T复合酸化剂...

Effects of different acidifier agents on growth,immune performance andmicroflora of weaned piglets

The aim of this study was to evaluate the effects of different acidifying agents on growth performance,immune performance and microflora of weaned piglets.A total of 38421 d weaning piglets with an average initial weight of(6.16±0.23)kg were randomly divided into 4 groups with 6 replicates per group and 16 replicates per group.Weaning piglets in each group were fed with basic diet,basic diet+45 mg/kg antimicrobial peptide,basic diet+4 kg/T citric acid and basic diet+3 kg/T complex acidifier for 4 weeks.Results:Compared with the antimicrobial peptide group,the daily feed intake of the two acidification groups on day 1~14,day 15~28 and day 1~28 decreased by 9.86%,13.88%,46.87%,50.88%,33.13%and 37.01%respectively(P<0.05),while the daily weight gain on day 15~28 and day 1~28 decreased by 49.73%,57.03%,31.38%and 48.67%respectively(P<0.05).The weight of the antibacterial peptide group and citric acid group on day 1~28 was significantly reduced by 11.44%and 13.43%compared with the control group(P<0.05).The serum IgG concentration of citric acid group was significantly increased by 43.07%(P<0.05)compared with the antimicrobial peptide group.On the 14th and 28th day after weaning,the number of lactobacillus in pig manure increased by 10.56%,8.94%,19.43%and 18.17%(P<0.05),and the number of bacillus in pig manure increased by 21.45%and 20.93%(P<0.05),respectively.On the 28th day after weaning,the number of E.coli in pig manure of acidifier treatment group was significantly reduced by 19.58%and 26.28%compared with the control group(P<0.05),while the number of Salmonella in pig manure on the 14th and 28th day after weaning was significantly reduced by 43.68%,46.44%,44.94%and 47.64%(P<0.05).Conclusion:Citric acid had a positive effect on feed conversion rate,increased the number of beneficial bacteria and serum IgG concentration,while compound acidifier had a negative effect on growth performance parameters and had a positive effect on intestinal flora.