蒲公英多糖对肉仔鸡免疫功能、血清生化指标和生长性能的影响

Effect of dandelion polysaccharide on immunologic function,serum biochemical indexes and growth performance of broiler chicken

试验旨在探讨蒲公英多糖对肉仔鸡免疫功能、血清生化指标和生长性能的影响。选取1日龄肉仔鸡300只,随机分为5组,每组3个重复,每个重复20只。空白对照组肉鸡饲喂基础日粮,阳性对照组在基础日粮中添加0.2 g/kg盐酸左旋咪唑,蒲公英多糖1 g/kg组、蒲公英多糖2 g/kg组和蒲公英多糖4 g/kg组分别在基础日粮中添加1、2、4 g/kg蒲公英多糖。试验期42 d。结果显示,与空白对照组相比,蒲公英多糖能够极显著或显著提高肉仔鸡胸腺指数、法氏囊指数、脾脏指数、血清中总蛋白、白蛋白和球蛋白含量(P<0.01或P<0.05),极显著提高肉鸡血清中免疫球蛋白G (IgG)、免疫球蛋白M (IgM)、免疫球蛋白A (IgA)、白细胞介素-2 (IL-2)、白细胞介素-4 (IL-4)和干扰素-γ (IFN-γ)含量(P<0.01),肉鸡血清碱性磷酸酶活性、尿素和肌酐含量均极显著降低(P<0.01)。蒲公英多糖组肉仔鸡的末重、平均日增重均极显著高于空白对照组(P<0.01),料重比极显著低于空白对照组(P<0.01)。研究表明,蒲公英多糖能够提高肉仔鸡的免疫功能,改善血清生化指标,提高生长性能,添加2 g/kg蒲公英多糖效果较好。

The experiment was to explore the effect of dandelion polysaccharides on immune function,serum biochemical indexes and growth performance of broiler chickens.A total of 300 one-day-old broiler chickens were divided into five groups,with three replicates in each group with 20 chickens in each replicate.The broiler chickens in blank control group were fed with a basal diet,while the broiler chickens in positive control group were fed with basal diet supplemented with 0.2 g/kg levamisole hydrochloride,the broiler chickens in 1 g/kg dandelion polysaccharide group,2 g/kg dandelion polysaccharide group and 4 g/kg dandelion polysaccharide group were fed with basal diet supplemented with 1,2 and 4 g/kg dandelion polysaccharide,respectively.The trial period was 42 d.The results showed that compared with blank control group,dandelion polysaccharide groups could very extremely or significantly increase the indexes of thymus,bursae and spleen,and the contents of total protein,albumin and globulin in serum of broilers(P<0.01 or P<0.05).The content of IgG,IgM and IgA,IL-2,IL-4 and IFN-γ in serum of broilers were extremely increased(P<0.01).Serum alkaline phosphatase,urea and creatinine content of broilers were extremely decreased(P<0.01).The final weight and average daily gain of broilers in dandelion polysaccharide groups were extremely higher than those in blank control group(P<0.01),and the feed to gain ratio was extremely lower than that in blank control group(P<0.01).The experiment indicates that dandelion polysaccharide can improve the immune function,serum biochemical indexes and growth performance of broilers,the effect of 2 g/kg dandelion polysaccharide is better.