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 180-day-old 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 corn-soybean 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 14-day 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),egg-breaking 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.%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/kgVc,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).
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