研究了万寿菊叶黄素（Marigold Lutein,MAR）和维生素C(VC)对高温环境下罗曼粉壳蛋鸡生产性能和蛋品质的影响规律。将216只180日龄身体健康、体重相似的罗曼粉蛋鸡作为试验动物，随机分为6个组，每组设3个重复，每个重复12只鸡。试验1组为高温对照组，饲喂基础日粮，试验2组饲喂基础日粮+200 mg/kg VC，试验3、4、5、6组在试验2组的基础上，分别添加60 mg/kg、120 mg/kg、180 mg/kg、240 mg/kg万寿菊叶黄素（分别组成复合剂Ⅰ、Ⅱ、Ⅲ、Ⅳ）。试验期56 d，其中预试期14 d，正式期42 d。研究结果表明，在长期高温环境中，日粮中添加120 mg/kg MAR+200 mg/kg VC，可有效提高蛋鸡生产性能，其中采食量、产蛋率、平均蛋重分别较对照组提高26.79%（P<0.01）、13.87%（P<0.05）和4.1%（P<0.01），破壳率降低53.49%（P<0.01），死淘率为0；同时可有效改善蛋品质，与对照组比较，蛋壳厚度、哈氏单位、蛋黄相对重有提高的趋势（P＞0.05）；蛋黄RCF值提高2.12（P＜0.01）、蛋黄红度（a*）提高90.37%（P＜0.01）、蛋黄黄度（b*）提高11.36%（P＜0.01）。
Abstract
The objective of this study was to reveal influence rules of marigold lutein and vitamin C on production performance and egg quality of Lohmann laying hens in high temperature. Two hundred and sixteen 180dayold Roman laying hens with similar weight and healthy condition were randomly divided into 6 groups with 4 replicates each and 12 hens in each replicate. The group 1 was a control group at a high temperature and fed the cornsoybean meal basal diet. The treatment 2 was fed basal diet with 200 mg/kg VC, and treatment 3、4、5、6 were added 60 mg/kg、120 mg/kg、180 mg/kg、240 mg/kg marigold lutein in the basal diet compared with that of treatment 2. This experiment lasted for 56 days, including 14day adaptation. The results showed that supplementation of 120 mg/kg MAR＋200 mg/kg VC significantly increased production performance at high temperature. Compared with the control group, feed intake and laying rate increasedby 26.79%（P<0.01）and 13.87%（P<0.05）. Furthermore, average egg weight increasedby 4.1%（P<0.01）, eggbreaking rate decreasedby 53.49%（P<0.01）, and mortality decreased to 0.At the mean time, egg quality was efficiently improved. There was an increasing trend in shell thickness, Haugh unit and yolk relative weight（P＞0.05）, values of RCF increasedby 2.12（P＜0.01）, moreover, red value and yellow value raisedby 90.37%（P＜0.01）and 11.36%（P＜0.01）respectively.
关键词
叶黄素 /
维生素C /
蛋鸡 /
高温环境 /
生产性能 /
蛋品质
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Key words
Lutein /
vitamin C /
laying hens /
high environmental temperature /
production performance /
egg quality
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脚注
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基金
安立龙（1966），男，陕西渭南人，教授，博士，硕士生导师,研究方向为动物繁殖原理与生物技术。Email: anlilong@126.com
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