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益生菌制剂对早期断奶仔猪生长性能和免疫指标的影响

DOI: 10.3969/j.issn.1006-267x.2012.06.019

Keywords: 益生菌,仔猪,生长性能,免疫指标

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Abstract:

本试验旨在研究益生菌制剂对早期断奶仔猪生长性能和免疫指标的影响。选用48头平均体重为(6.39±0.42)kg的(21±2)日龄"杜×长×大"三元杂交断奶仔猪,按性别、体重和窝源基本一致的原则随机分为2组,每组4个重复,每个重复6头猪。试验1组为对照组,饲喂基础饲粮,试验2组为益生菌组,每kg基础饲粮中添加1×109CFU活菌。试验期为21d。结果表明:1)与对照组相比,添加益生菌制剂可显著提高断奶仔猪平均日增重(P<0.05),并显著降低料重比和腹泻率(P<0.05);2)与对照组相比,添加益生菌制剂可以显著提高仔猪断奶后第7天血清白介素-1β水平,显著提高断奶后第21天血清免疫球蛋白G含量、白介素-6和肿瘤坏死因子-α水平及回肠黏膜分泌性免疫球蛋白A含量(P<0.05),空肠分泌性免疫球蛋白A含量稍高于对照组,但差异不显著(P>0.05),粪便免疫球蛋白A含量及外周血T淋巴细胞CD3+、CD4+、CD8+及CD4+/CD8+无显著差异(P>0.05)。由结果可知,益生菌制剂可提高断奶仔猪的生长性能,增强早期断奶仔猪的免疫力,有效缓解早期断奶应激引起的仔猪免疫功能下降。

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