酵母细胞壁多糖与铝硅酸盐复合物对猪生长性能、免疫指标及养分消化率的影响

本研究旨在探讨酵母细胞壁多糖(yeast polysaccharide,YP)与铝硅酸盐复合物(alumi-nosilicate complex,AC)对猪的生长性能、免疫指标及养分消化率的影响。试验选用平均体重为(66.18±1.26)kg的"杜×长×大"三元杂交猪140头,随机分成5组,每组4个重复,每个重复7头猪。各组分别饲喂添加不同剂量复合物的试验饲粮,A组为对照组,不添加复合物;B组添加0.1%YP;C组添加0.1%YP和0.9%AC;D组添加0.1%YP和1.9%AC;E组添加0.1%YP和2.9%AC。试验期51 d。结果表明:1)D、E组平均日增重显著低于对照组(P<0.05),各组平均日采食量和料重比差异不显著(P>0.05);2)与对照组相比,D组血清谷胱甘肽过氧化物酶(GSH-Px)活性及补体3(C3)、免疫球蛋白M(IgM)、免疫球蛋白A(IgA)、免疫球蛋白G(IgG)水平显著提高(P<0.05),血清超氧化物歧化酶(SOD)活性和补体4(C4)水平无显著差异(P>0.05);3)各组养分消化率无显著差异(P>0.05)。由此可见,YP和AC复合使用降低了育肥猪的生长性能,0.1%YP和1.9%AC同时添加可增强生长猪的免疫功能。

Effects of Yeast Polysaccharide and Aluminosilicate Complex on Growth Performance,Immune Indices and Nutrient Digestibility of Pigs

This experiment was conducted to explore the effects of yeast polysaccharide(YP) and aluminosilicate complex(AC) on growth performance,immune indices and nutrient digestibility of pigs.One hundred and forty crossed pigs(Dueoc×Landrace×Yorshine) with an average body weight of(66.18±1.26) kg were randomly assigned to 5 groups with 4 replicates per group and 7 pigs per replicate.Pigs were fed different experimental diets which contained different doses of admixture in 5 groups: group A(control group) did not contain the admixture;group B contained 0.1% YP;group C contained 0.1% YP and 0.9% AC;group D contained 0.1% YP and 1.9% AC;group E contained 0.1% YP and 2.9% AC.The experiment lasted for 51 days.The results showed as follows: 1) the average dietary gain in groups D,E was significantly lower than that in the control group(P<0.05),but there was no significant difference in average dietary feed intake and feed/gain among all groups(P>0.05).2) Compared with the control group,the levels of complement 3,immunoglobulin M,immunoglobulin A and glutathione peroxidase activity in serum were increased significantly(P<0.05),but there was no significant difference in superoxide dismutase activity and complement 4 level in serum.3) There was no significant difference in nutrient digestibility among all groups(P>0.05).In conclusion,adding YP and AC admixture in the diet can decrease growth performance,while adding 0.1% YP and 1.9% AC in the diet can enhance immune function of growing pigs.