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首页> 外文期刊>Animal Feed Science and Technology >Dietary iron effects on broiler breeder performance and egg iron contents.
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Dietary iron effects on broiler breeder performance and egg iron contents.

机译：膳食铁对肉鸡育种性能和蛋铁含量的影响。

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Sixty Cobb 500 broiler breeder hens, 22 wks of age, were individually placed in galvanized cages and fed diets without iron (Fe) supplementation for 12 weeks. Birds were then randomly allocated to six dietary treatments with the same nutrient profile, except for Fe, in a factorial of two diets (all vegetable and meat and bone meal - MBM) and three Fe sources (control, inorganic and complexed). The all-vegetable diet was formulated with maize, soybean meal and wheat bran whereas the MBM containing diet included 25 g MBM/kg. The control diets were not supplemented with Fe, whereas inorganic and complexed diets had 60 mg Fe/kg as supplement from Fe2+ sulfate or Fe-amino acid (Fe-AA), respectively. Diets were provided for three periods of four weeks each and eggs were collected daily. Hen day egg production and Fe content of yolk and albumen were analyzed using a two-way anova with repeated measures. Egg production was lowest (P < 0.05) for birds fed diets without Fe supplementation but no difference (P > 0.05) was detected between the inorganic and complexed Fe sources. Contents of Fe in yolk increased from the first to the second period (P < 0.001) without changes afterwards, whereas it decreased in albumen from the second to the third period (P < 0.001). Egg yolk Fe concentration was highest for the MBM containing diet supplemented with Fe-AA and lowest for the all-vegetable diet not supplemented with Fe, with all the other treatments being intermediate (P < 0.001). Albumen Fe concentration increased when Fe was supplemented to diets containing MBM, but further increases depended on the use of Fe-AA (P < 0.001). It is concluded that breeder hens have reduced hen day egg production when diets are not supplemented with Fe and that Fe supplementation can affect yolk and albumen contents depending on the presence of MBM in the diet. All rights reserved, Elsevier.
机译：将60只22周龄的Cobb 500肉鸡种鸡分别放在镀锌的笼子里，并饲喂不补充铁（Fe）的饲料12周。然后将家禽随机分配到六种具有相同营养成分的饮食处理中，除了铁以外，还分两种饮食（所有蔬菜，肉和骨粉-MBM）和三种铁源（对照，无机和复合）。全素食饮食由玉米，豆粕和麦麸配制而成，而含MBM的饮食包括25 g MBM / kg。对照日粮中未添加铁，而无机日粮和复合日粮中分别添加了60 mg Fe / kg的Fe 2 + 硫酸盐或Fe-氨基酸（Fe-AA）。提供三个周期的饮食，每个周期四个星期，每天收集鸡蛋。母鸡一天的产蛋量以及蛋黄和蛋清中的铁含量采用双向方差分析进行了重复测量。在不添加铁的情况下，饲喂家禽的鸡蛋产量最低（P <0.05），但无机和复合铁源之间没有发现差异（P> 0.05）。卵黄中的铁含量从第一阶段到第二阶段增加（P <0.001），此后没有变化，而从第二阶段到第三阶段的蛋清中铁的含量下降（P <0.001）。含MBM的日粮中添加Fe-AA的蛋黄中Fe含量最高，而不添加Fe的全蔬菜日粮中的蛋黄中Fe含量最低，其他所有处理均处于中间水平（P <0.001）。当在含MBM的日粮中添加铁时，白蛋白中铁的浓度会增加，但进一步的增加取决于铁-氨基酸的使用（P <0.001）。结论是，在不添加铁的日粮中，种鸡会降低母鸡的产蛋量，并且根据日粮中MBM的存在，铁的添加会影响蛋黄和蛋清含量。保留所有权利，Elsevier。

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