不同饲养方式对各产蛋阶段鸡蛋品质的影响

摘要

目的:比较不同饲养方式对鸡蛋品质的影响,为蛋鸡产业化生产提供指导.方法:以如皋黄鸡为试验素材,采用笼养和平养两种饲养方式,测定不同产蛋阶段常规蛋品质、营养成分和矿物元素含量.结果:产蛋初期,平养条件下蛋黄色泽、脂肪和胆固醇含量极显著高于笼养(P＜0.01),铜和铁含量显著低于笼养(P＜0.05).产蛋中期,平养条件下蛋壳强度、蛋黄重量、蛋黄比率、蛋黄蛋白比均显著低于笼养(P＜0.05);哈氏单位以及蛋白质、维生素E和氨基酸含量均显著高于笼养(P＜0.05);蛋黄色泽、维生素A和胆固醇含量均极显著高于笼养(P＜0.01),锰含量极显著低于笼养(P＜0.01).产蛋后期,平养条件下胆固醇含量极显著高于笼养(P＜0.01);蛋白质、维生素A和铜含量显著高于笼养(P＜0.05);锰含量极显著低于笼养(P＜0.01);硒含量显著低于笼养(P＜0.05).结论:不同产蛋阶段,饲养方式对鸡蛋品质均有一定的影响.%[Objective] To study the effect of raising nanner on the egg quality of rugao-yellow chicken to provide guidance for layer industrialization production.[Method] Rugao-yellow chicken were reared at fiat and cage,and the general egg quality,the contents of nutritional ingredient and mineral element were measured.[Result] At initial stage of laying,the egg color,fat and cholesterol contents of flat pension were extremely higher than reared in cages (P ＜0.01).Cu and Fe contents were lower than reared in cages (P ＜0.05).At middle-laying,the eggshell strength,yolk weight,yolk ratio and yolk protein ratio of flat pension were lower than reared in cages (P ＜0.05).Haugh Unit,protein,VE and amino acid contents were higher than reared in cages (P ＜0.05).Rolk color,VA and cholesterol contents were extremely higher than reared in cages (P ＜0.01).Mn content was extremely lower than reared in cages (P ＜0.01).At late period of laying,the cholesterol content of flat pension was extremely higher than reared in cages (P ＜0.01),the protein,VA and Cu contents were higher than reared in cages (P ＜0.05),the Mn content was extremely lower than reared in cages (P ＜ 0.01),and the Se content was lower than reared in cages (P ＜0.05).[Conclusion] During different laying stages,rearing manners played certain influence on the egg qualities.