山楂提取物对断奶仔猪生长性能、免疫功能、抗氧化能力及肠道微生物的影响研究

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为探讨不同添加量山楂提取物(CF)对断奶仔猪生长性能、免疫功能、抗氧化能力和肠道微生物的影响,试验选择体重为(8.85±0.73)kg左右、健康状况良好的28日龄“杜×长×大”断奶仔猪30头,按体重相近的原则随机分为5组,每组6个重复,每个重复1头仔猪.对照组(CON组)饲喂基础日粮,抗生素组(CTC组)是在基础日粮中添加75mg/kg金霉素,3个试验组分别在基础日粮中添加300、600、1200 mg/kg山楂提取物(CF1组、CF2组、CF3组),试验期28 d.结果 表明:(1)与CON组相比,CF2组和CF3组断奶仔猪的末重(FBW)极显著提高(P<0.01),平均日增重(ADG)和采食量(ADFI)显著提高(P<0.05),料重比(F/G)和腹泻率显著降低(P<0.05).与CTC组相比,CF2组和CF3组断奶仔猪的FBW、ADG和ADFI显著提高(P<0.05).(2)与CON组相比,CF2组和CF3组血清中IgA含量显著提高(P< 0.05),CF2组和CF3组之间的血清IgA差异不显著(P>0.05).CF2组的血清IgM含量显著高于其余四组(P<0.05).(3)CF2组和CF3组血清总超氧化物歧化酶(T-SOD)含量均显著高于CON组、CTC组和CF1组(P<0.05),CF2组和CF3组之间血清T-SOD含量差异不显著(P>0.05).CF2组血清谷胱甘肽过氧化物酶(GSH-Px)显著高于其余四组(P<0.05).与CON组相比,CF2组血清丙二醛(MDA)含量显著降低(P<0.05),其余各组血清MDA含量差异不显著(P>0.05).(4)CF2组和CF3组结肠乳酸杆菌数量均显著高于CON组、CTC组和CF1组(P<0.05),CTC组、CF2组和CF3组结肠大肠杆菌数量显著低于CON组和CF1组(P<0.05),但CTC组、CF2组和CF3组之间结肠大肠杆菌数量差异不显著(P>0.05).综上所述,CF2组即日粮添加600mg/kg山楂提取物可提升断奶仔猪生长性能,降低腹泻率,改善免疫功能,提高抗氧化能力,改善肠道微生物菌群.
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