日粮核黄素水平对热应激条件下肉仔鸡免疫机能的影响  

EFFECTS OF DIETARY LEVELS OF RIBOFLAVIN ON IMMUNE FUNCTION IN BROILERS UNDER HEAT STRESS

作　　者：王丹莉[1] 张敏红[1] 文杰[1] 杜荣[1] 谢鹏[1] 郑姗姗[1] 

机构地区：[1]中国农业科学院畜牧研究所,北京100094

出　　处：《动物营养学报》2003年第3期25-27,共3页CHINESE JOURNAL OF ANIMAL NUTRITION

摘　　要：本试验采用360只21日龄Arbor Acres商品代肉仔鸡,随机分成6组,每组3个重复,每个重复20只鸡,公母各半,试验期为5周,研究日粮核黄素水平对热应激条件下肉仔鸡免疫机能的影响。日粮中添加的核黄素水平分别为0、1.6、5.2、12.4、23和48mg/kg。试验结果表明,高温条件下添加不同水平的核黄素均可以显著降低肉仔鸡的死亡率(P<0.05)。不同添加水平的核黄素对热应激条件下42日龄、56日龄肉仔鸡的胸腺、脾脏、法氏囊相对重量无显著影响(P>0.05)。不同添加水平的核黄素显著提高了热应激条件下42日龄肉仔鸡血清新城疫抗体效价。随着日龄的增长,添加5.2、12.4、23和48mg/kg水平的核黄素可以显著提高肉仔鸡56日龄血清新城疫抗体效价(P<0.05)。由此得出:添加2倍于NRC水平的核黄素可以显著提高热应激条件下肉仔鸡的血清新城疫抗体效价,降低肉仔鸡的死亡率。An experiment was conducted to investigate the effect of dietary levels of riboflavin on performance of broilers under heat stress. 360 Arbor Acres chickens aged 21 days old were randomly divided into 6 groups, there were 3 replicates in each group and 20 chickens in each replicate(10 males and 10 females) .The birds in cages were raised in an environment controlled room maintained at 30- 35℃ under continuous lighting for five weeks.They all were fed same basal diet and gave 6 treatments as follows: (1) basal diet + 0.0mg/kg riboflavin as control,(2) basal diet+ 1.6mg/kg riboflavin, (3)basal diet + 5. 2mg/kg riboflavin, (4)basal diet+ 12.4mg/kg riboflavin,(5)basal diet + 23mg/kg riboflavin,(6)basal diet + 48mg/kg riboflavin. The results showed that: 1. riboflavin supplement reduced mortality of the broilers under heat stress(P<0.05) .2. the effects of dietary riboflavin levels on the weight of thymus, spleen and fabricius bursa ware not found. 3. the dietary riboflavin levels increased serum antibody titres to Newcastle disease virus of 42 days old broilers. Higher level riboflavin(5. 2mg/ kg) increased serum antibody titres to Newcastle disease virus of 56 days old broilers.

关 键 词：日粮 核黄素水平 热应激条件 肉仔鸡 免疫机能 影响因素 饲养环境 

分 类 号：S831.5[农业科学—畜牧学]