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43~63日龄黄羽肉鸡核黄素需要量研究

DOI: 10.3969/j.issn.1006-267x.2012.04.008

Keywords: 核黄素,黄羽肉鸡,需要量

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Abstract:

本试验旨在研究饲粮中添加不同水平核黄素对43~63日龄黄羽肉鸡生长性能、血液和肝脏生化指标及肉质性状的影响,探讨43~63日龄黄羽肉鸡核黄素需要量。试验选用43日龄岭南黄羽肉公鸡1200只,采用单因子随机分组试验设计,随机分为5组,每组6个重复,每个重复40只鸡。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮中添加1.5、3.0、6.0和12.0mg/kg核黄素的试验饲粮,试验期21d。结果表明:与对照组相比,添加3.0mg/kg核黄素显著提高了试验鸡平均日增重(P<0.05),各组间料重比差异不显著(P>0.05)。饲粮添加核黄素显著降低了血清氧化型谷胱甘肽(GSSG)含量,并提高了还原型谷胱甘肽/氧化型谷胱甘肽(GSH/GSSG)值(P<0.05),其中以3.0mg/kg添加组GSH/GSSG值最高;添加6.0mg/kg核黄素显著提高了试验鸡肝脏黄嘌呤氧化酶(XOD)活性(P<0.05);试验鸡血浆核黄素含量随着饲粮核黄素添加水平的增加而呈递增趋势,当添加水平为12.0mg/kg时与对照组差异显著(P<0.05)。饲粮添加核黄素对试验鸡脾脏指数、法氏囊指数、胸腺指数、血液T淋巴细胞增殖效应以及碱性磷酸酶(ALP)活性影响均不显著(P>0.05)。饲粮添加3.0mg/kg核黄素显著提高了胸肌红度值(P<0.05),添加6.0mg/kg核黄素则显著降低了胸肌亮度值(P<0.05);添加核黄素对试验鸡胸肌pH、滴水损失及胸肌黄度值无显著影响(P>0.05)。综上所述,以平均日增重和抗氧化性能为评定指标,43~63日龄黄羽肉鸡核黄素适宜添加水平为3.0mg/kg。

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