寡果糖对肥育猪生长性能、肠道菌群和免疫功能的影响

饲粮中添加 0 .2 5 %、0 .5 %和 0 .75 %寡果糖 ,观察了其对杜长加肥育猪生长性能、肠道菌群和免疫功能的影响。与对照组相比 ,肥育猪日粮中添加 0 .2 5 %、0 .5 %和 0 .75 %寡果糖 ,使日增重分别提高 4.0 0 %(P<0 .0 5 )、9.6 7%(P<0 .0 1)和 10 .6 7%(P<0 .0 1) ,添加 0 .5 %和 0 .75 %寡果糖 ,使料重比分别降低 8.19%(P<0 .0 1)和 7.6 0 %(P<0 .0 5 ) ;添加 0 .5 %和 0 .75 %寡果糖 ,使结肠中双歧杆菌、乳酸杆菌数分别增加 2 99.49%(P<0 .0 1)和 314.81%(P<0 .0 1) ,97.40 %(P<0 .0 5 )和 141.6 7%(P<0 .0 5 ) ,并使结肠内容物 p H值分别降低 0 .5 0 (P<0 .0 5 )和 0 .90 (P<0 .0 1) ;添加0 .2 5 %、 0 .5 %和 0 .75 %寡果糖 ,使结肠中大肠杆菌以及梭菌数分别下降 35 .6 5 %(P<0 .0 1)、86 %(P <0 .0 1)和82 .47%(P<0 .0 1)以及 37.91%(P<0 .0 5 )、98.5 3(P<0 .0 1)和 94.6 6 %(P<0 .0 1) ;添加 0 .2 5 %、0 .5 %和 0 .75 %寡果糖 ,使血清中 Ig A分别提高 11.74%(P<0 .0 5 )、2 4.88%(P<0 .0 1)和 30 .5 2 %(P<0 .0 1) ,添加 0 .5 %和 0 .75 %寡果糖 ,使血清 Ig G分别提高 13.0 5 %(P<0 .0 5 )和 11.42 %(P<0 .0 5 ) ,并使血液中 SOD活性分别提高 2 0 .10 %(P<0 .0 1)和 16 .36 %(P<0 .0 5 ) ,添加

Effects of Fructooligosaccharide on Growth Performance,Intestinal Microflora and Immune Function in Finishing Pigs

This experiment was conducted to study the effe cts of dietary fructooligosaccharide(FOS) at the level of 0.25%,0.5% and 0.75 % o n growth performance,intestinal microflora and immune function in finishing pigs (Duroc*Landrance*Jia).The results were as follows:(1)Consumption of 0.25%,0.5% a nd 0.75% FOS increased ADG by 4.00%(P<0.05),9.67%(P<0.01) and 10.6 7%(P <0.01),as compared with control,respectively.Consumption of 0.5% and 0.75% FOS decreased F/G ration by 8.19%(P<0.01) and 7.60%(P<0.05),respecti vely;(2)Pig fed 0.5% and 0.75% FOS had an enrichment to colonic Bifidobacteria and Lactobacilli by 299.49%(P<0.01) and 314.81%(P<0.01),97.40%(P <0.05) and 141.67%(P<0.05) together with a reduction of pH by 0.50(P <0.05) and 0.90(P<0.01).Pigs fed 0.25%, 0.5% and 0.75% FOS had a suppression to Colibacillus and Clostridia by 35.65% ( P<0.01),86%(P<0.01) and 82.47%(P<0.01),37.91%(P<0.05),98.53 %(P <0.01) and 94.66%(P<0.01),respectively;(3)Supplementation with 0.25%,0. 5% a nd 0.75% FOS increased the content of IgA in serum by 11.74%(P<0.05),24. 88%( P<0.01) and 30.52%(P<0.01),respectively.Supplementation with 0.5% an d 0. 75% FOS increased the content of IgG in serum and SOD in blood by 13.05%(P< 0 .05) and 11.42%(P<0.05),20.10%(P<0.01) and 16.36%(P<0.05),res pective ly.Supplementation with 0.75% FOS increased GSH-Px in blood by 12.92%(P<0 .05).