Effect of vitamin E and A supplementation on egg yolk α-tocopherol concentration
Effect of vitamin E and A supplementation on egg yolk α-tocopherol concentration
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DOI：
10.1093/ps/81.3.376
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发表时间：
2002-03-01
期刊：
影响因子：
4.4
通讯作者：
Mateos, GG
中科院分区：
文献类型：
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作者：
Grobas, S;Méndez, J;Mateos, GG
本研究的目的是评估膳食dl-α-生育酚乙酸酯（α-TAC）和维生素A补充剂对蛋黄α-生育酚（α-T）浓度的影响。共使用96只32周龄伊萨褐母鸡（褐蛋鸡）。八种浓度的α-TAC（0、20、40、80、160、320、640和1，280 IU/kg饲料）被包括在含有4，000 IU维生素A/kg饲料的玉米-豆粕基饲料中。生产参数不受饮食处理的影响。蛋黄α-T浓度的母鸡间变化增加在较高的饮食摄入量。对数转换稳定了方差，表明日粮中α-TAC添加水平与α-T蛋黄浓度之间存在线性关系（P < 0.001）。随着饲料中总活性炭浓度的增加，蛋黄对总活性炭的吸收率呈线性下降（P < 0.001）。进行了一项平行实验，其中另外四组母鸡饲喂含有四种水平的膳食α-TAC（0、40、160和640 IU/kg）和40，000 IU维生素A/kg膳食的膳食。在添加最高水平维生素A的日粮中，发现蛋黄α-T浓度显著降低（P < 0.001）。在蛋黄α-T浓度上没有观察到膳食α-TAC和维生素A浓度的相互作用。没有观察到日粮处理对蛋黄氧化和其他鸡蛋品质特性的影响。
The objective of this study was to asses the effect of dietary dl-alpha-tocopheryl acetate (alpha-TAC) and vitamin A supplementation on egg yolk alpha-tocopherol (alpha-T) concentration. A total of 96 ISA brown hens (a brown-egg laying hen), 32 wk of age, was used. Eight concentrations of alpha-TAC (0, 20, 40, 80, 160, 320, 640, and 1,280 IU/kg diet) were included in a corn-soybean meal-based diet containing 4,000 IU of vitamin A/kg diet. Production parameters were not affected by dietary treatment. Interhen variation in yolk alpha-T concentration increased at higher dietary intakes. Logarithmic transformation stabilized variance and showed the existence of a linear relationship between dietary alpha-TAC supplementation level and alpha-T egg yolk concentration (P < 0.001). As the dietary concentration of alpha-TAC rose, efficiency of uptake of alpha-T from feed to yolk decreased linearly (P < 0.001). A parallel experiment was carried out in which four additional groups of hens were fed diets containing four levels of dietary alpha-TAC (0, 40, 160, and 640 IU/kg) and 40,000 IU vitamin A/kg diet. A significantly lower egg yolk alpha-T concentration was found in hens fed diets including the highest level of vitamin A supplementation (P < 0.001). No interaction of dietary alpha-TAC and vitamin A concentrations was observed on egg yolk alpha-T concentration. No effect of dietary treatment was observed on yolk oxidation and other egg quality characteristics.