蛋鸡日粮碘和硒水平的调控对碘和硒向蛋转运的影响

Effect of Regulating Dietary Iodine and Selenium Level for Laying Hens on Transfer of Dietary Iodine and Selenium into Chicken Eggs

将30羽278日龄罗曼蛋鸡随机分成3组,以日粮含Ⅰ 0．5 mg·kg 1、含Se 0．2 mg·kg 1(对照组)、含Ⅰ 50 mg·kg 1、含Se 1．2 mg·kg 1(试验Ⅰ组)、含Ⅰ 100mg·kg 1、含S32.2 mg·kg 1(试验Ⅱ组)饲喂 8周,观察蛋碘和硒含量的变化。结果表明,与对照组比较,试验Ⅰ组和Ⅱ组蛋黄碘含量分别提高10．81倍和 13．37倍;蛋黄硒提高3．51倍和6．34倍;蛋白碘和硒含量均有显著增加;并伴有血浆碘和硒含量的同步上升。这些结果提示,通过日粮碘和硒水平的调控可大幅度提高蛋中碘和硒含量,产蛋母鸡是日粮中碘和硒向蛋中转运的良好载体。

Thirty 278-day old hens were divided into three groups randomly and fed with diets containing 0. 5 mg Ⅰ and 0. 2 mg Se· kg -1(control group), 50 mg Ⅰ and 1. 2 mg Se ·kg 1 (goup Ⅰ), and100 mg Ⅰ and 2. 2 mg Se · kg-1 (group Ⅱ ), respectively, for 8 weeks. The changes of iodine and selenium in egg were observed. The results showed that, compared with control group, yolk iodine contents in group Ⅰ and group Ⅱ were increased by 1081% and 1337%, yolk selenium contents by 351% and 634%. Egg white iodine and selenium contents were significantly increased. And iodine and selenium in plasma were also synchronously enhanced. Those results suggested that regulating dietary iodine and selenium level for laying hens could cause much higher iodine and selenium in egg. So, the laying hen could be used as an effectual biologic transporter to transfer iodine and selenium from diet into egg.