非特异性卵黄抗体对雏鸡生长性能、免疫机能及微生物数量的影响

发布时间：2019-01-22 12:05

【摘要】：试验旨在研究日粮中添加非特异性卵黄抗体(Ig Y)对雏鸡生长性能、免疫机能及微生物数量的影响,为Ig Y作为饲料添加剂在畜禽饲料中的应用提供理论依据。选取同一批出雏、体重接近的1日龄罗曼褐公雏240只,随机分为2组(对照组和试验组),每组6个重复,每个重复20只雏鸡。对照组饲喂基础日粮,试验组在基础日粮中添加0.1%非特异性Ig Y,试验期6周。每周末称重,在6周龄末从每个重复选取接近该重复平均体重的试验鸡2只屠宰,测定其消化器官的发育、相关免疫指标及肠道微生物数量。结果发现,与对照组相比,日粮中添加非特异性Ig Y显著提高了1和5周龄雏鸡体重(P0.05);显著提高了雏鸡腺胃重、脾脏重、血清白细胞介素-2、空肠食糜分泌型免疫球蛋白A(s Ig A)含量(P0.05);显著提高了盲肠乳酸杆菌数量(P0.05)。以上结果表明,雏鸡日粮中添加非特异性Ig Y可以促进雏鸡的生长和消化器官发育,提高机体的免疫机能,促进肠道有益菌生长。
[Abstract]:The purpose of the experiment was to study the effect of adding non-specific yolk antibody (Ig Y) into diet on growth performance, immune function and microbial quantity of chicks, and to provide theoretical basis for the application of Ig Y as feed additive in livestock and poultry feed. Two hundred and forty Roman brown male chicks of the same weight were randomly divided into two groups (control group and experimental group) with 6 replicates in each group and 20 chicks in each replica. The control group was fed with basal diet and the experimental group was supplemented with 0.1% nonspecific Ig Y. for 6 weeks. At the end of 6 weeks of age, two chickens were slaughtered to determine the development of digestive organs, the relative immune indexes and the number of intestinal microbes. The results showed that addition of nonspecific Ig Y significantly increased the body weight of 1 and 5 week-old chicks compared with the control group (P0.05). Significantly increased the weight of gland stomach, spleen weight, serum interleukin-2, jejunum secretory immune globin A (s Ig A) content (P0.05), significantly increased the number of Lactobacillus caecum (P0.05). The results showed that the addition of nonspecific Ig Y to the diet could promote the growth of the chicks and the development of digestive organs, improve the immune function of the body, and promote the growth of intestinal beneficial bacteria.
【作者单位】：扬州大学动物科学与技术学院;中国农业科学院家禽研究所;
【基金】：江苏省苏北科技发展计划(科技富民强县项目)(BN2015135) 淮安市重点研发计划(现代农业)(HAN2015012)
【分类号】：S831.5

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