益生素对乌骨鸡免疫机能和物质代谢的影响

Effect of Probiotics on the Immune Function and Metabolism of Black Bone Chickens

选取1日龄健康活泼乌骨鸡450只,随机分成3组(A,B,C),每组设3个重复,每个重复50只。A组为对照组,喂基础日粮,B、C组为试验组,B组在基础日粮基础上添加125mg/kg黄霉素,C组在基础日粮基础上添加0.7%的益生素,以研究益生素对乌骨鸡免疫机能和物质代谢的影响。结果表明:C组与B组相比,免疫器官(法氏囊、脾脏、胸腺)的相对重和新城疫血凝抑制试验抗体效价差异极显著(P<0.01),与A组相比差异显著(P<0.05)。C组的表观氮存留率、干物质消化率和有机物消化率与A组相比分别提高了10%(P<0.05),8.3%(P<0.05),11%(P<0.05),但C、B组间差异不显著(P>0.05)。这说明,在提高乌骨鸡免疫机能方面,益生素比抗生素具有更大的优势;而在提高物质代谢方面,益生素可以与抗生素相匹敌。

To study the effects of probiotics on the immune function and metabolism of black bone chickens, 450 one-day-old black bone chickens were randomly divided into three groups （A, B, C）, with three replicates each group and 50 chicks each replicate. Group A, the control, was fed the basic diet. While Groups B and C were respectively added 125 mg/kg bambermycin and 0.7% probioties. The results showed that there was extremly significant difference between the group B and group C on the relative weight of immune organs （fabricius bursa, spleen and thymas） and ND-HI antibody titers. Compared with the group A, the rate of apparent nitrogen reserve, digestibilities of dry matters and organic matters of group C were increased by 10.0%（P〈0.05）, 8.3%（P〈0.05） and 11.0%（P〈0.05）respectively; but there was no significant difference between group B and C. These indicated that probiotics are better than antibiotics in promoting immune function of black bone chickens and can replace antibiotics to enhance digestibility of black bone chickens.