Institute for Animal Nutrition, Friedrich-Loeffler-Institute, Braunschweig, Germany.
Arch Anim Nutr. 2012 Oct;66(5):385-401. doi: 10.1080/1745039X.2012.719795.
In the presented study the effect of different iodine (I) levels and sources in hen feed on the iodine concentration of different tissues, blood serum, and eggs of laying hens was studied. For this purpose, two experiments were conducted with 30 laying hens each. In these experiments feed was enriched with KI and Ca(IO(3))(2), respectively, at 0 (Control), 0.25, 0.5, 2.5 and 5 mg I/kg feed, resulting a analysed iodine level from 0.44 to 4.20 mg/kg feed. After four weeks experimental feeding the iodine concentrations of thyroid glands, blood, meat, liver, abdominal fat and eggs were measured with inductively coupled plasma mass spectrometry. The experimental treatment did not affect hen performance. The iodine supplementation significantly increased the iodine concentration of eggs (144-1304 μg/kg), thyroid glands (3367-5975 μg/g), blood serum (16-67 μg/kg) and liver (13-43 μg/kg). Meat (about 14 μg I/kg) and abdominal fat (about 12 μg I/kg) were not significantly affected by iodine treatment. Comparative regression analyses showed that at a similar iodine intake, the supply via KI resulted in significantly higher iodine deposition into eggs than Ca(IO(3))(2). Due to the high carry-over of iodine into eggs, eggs may considerably contribute to the iodine supply of the consumers.
在本研究中，研究了鸡饲料中不同碘（I）水平和来源对产蛋母鸡不同组织、血清和鸡蛋中碘浓度的影响。为此，进行了两项共 30 只产蛋母鸡的实验。在这些实验中，饲料分别用 KI 和 Ca(IO(3))(2) 富集，碘含量分别为 0（对照）、0.25、0.5、2.5 和 5mg I/kg 饲料，导致饲料中分析碘含量为 0.44 至 4.20mg/kg 饲料。经过四周的实验喂养后，采用电感耦合等离子体质谱法测定甲状腺、血液、肌肉、肝脏、腹部脂肪和鸡蛋中的碘浓度。实验处理未影响母鸡的产蛋性能。碘的补充显著增加了鸡蛋（144-1304μg/kg）、甲状腺（3367-5975μg/g）、血清（16-67μg/kg）和肝脏（13-43μg/kg）中的碘浓度。肉（约 14μg I/kg）和腹部脂肪（约 12μg I/kg）不受碘处理的显著影响。比较回归分析表明，在相似的碘摄入量下，KI 的供应导致鸡蛋中的碘沉积明显高于 Ca(IO(3))(2)。由于碘大量转移到鸡蛋中，鸡蛋可能会为消费者提供相当数量的碘。
