摘要:
试验选用90头平均体重为(11.2±0.8)kg断奶仔猪,分为处理1组(对照组)、处理2组(抗生素组)、处理3组(低聚木糖组)、处理4组(益生素组)、处理5组(益生素+低聚木糖组)5个处理,每个处理3个重复,每个重复6头仔猪,研究益生素和低聚木糖对仔猪生长性能和肠道菌群的影响。结果表明:处理2、3、4、5组的平均日增重均显著高于对照组(P<0.05),处理5组的日增重最高,与处理2组差异显著(P<0.05)。处理2、3、4、5组的料重比、血清尿素氮和肠道中大肠杆菌数量均显著低于对照组(P<0.05),处理5组的血清尿素氮和肠道中大肠杆菌数量最低。处理3、4、5组的IgG和IgM的浓度比处理1组和处理2组显著提高(P<0.05),处理5组的血清IgG和IgM的浓度最高。处理3、4、5组的肠道中乳酸杆菌的数量比处理1组、处理2组显著增加(P<0.05),处理5组的肠道中乳酸杆菌的数量最高。说明日粮中单独或组合添加益生素和低聚木糖均能提高仔猪生长水平,促进肠道菌群平衡,改善机体免疫功能,益生素和低聚木糖组合存在一定的互作效果。
Abstract:
Ninety weaned piglets [Duroc×Landrace×Yorkshire,average body weight(11.2±0.8)kg]were selected and divided into group 1(control group,basic diet),group 2(basic diet added with antibiotics),group 3(basic diet added with xylo-oligosaccharide),group 4(basic diet added with probiotics)and group 5(basic diet added with probiotics and xylo-oligosaccharide).Each group had 3repeats,to observe the effect of probiotics and xylo-oligosaccharide on growth performance and enteric microbial in weaned piglets.The results showed that thoct compared with control,the average daily gain was significantly increased in group 2,3,4and group 5(P<0.05)and the highest was observed in group 5,showing significantly increase than group 2;feed conversion rate,serum urea N and E.coli in jejunum were significantly decreased(P<0.05)in group 2,3,4,5and the lowest of them was observed in group 5.Serum IgG and IgM were higher in group 3,4,5than group 2and control(P<0.05),and the highest levels of IgG and IgM was obtained in group 5.Lactic acid bacteria in jejunum were higher in group3,4,5than group 2and control(P<0.05)and the highest was obtained in group 5.The results indicated that based diet added individually or combination with probiotics and xylo-oligosaccharide can improve the growth performance,microbial population status and immune function of weaned piglets.
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