Study of the correlation between iodine and iron levels in diet and iodine and iron contnets in plasma,liver and egg

Thirty 278 day old hens were divided into three groups randomly and fed with diets containing 0.5 mg Ⅰ,25 mg Fe/kg (control group),50 mg Ⅰ,525 mg Fe/kg (group Ⅰ) and 100 mg Ⅰ,1 025 mg Fe/kg (group Ⅱ),respectively,for 8 weeks.The transfer of dietary iodine and iron in hens body was observed.The results showed that,compared with control group,plasma iodine contents in group Ⅰ and group Ⅱ were increased by 153% and 201%,yolk iodine contents by 1 395% and 1 762%,albumen iodine contents by 121% and 187%,plasma iron contents by 115% and 142%,yolk iron contents by 77% and 124%,liver iron contents by 105% and 149%,respectively.However,the changes in albumen iron and liver iodine were not found.The results of correlation determination showed that there were very significant positive relationships between dietary iodine and iodine contents in plasma,yolk and albumen,between plasma iodine and iodine contents in yolk and albumen,between dietary iron and iron contents in plasma,yolk and liver,and between plasma iron and iron contents in yolk and liver.Those results suggested that the diet supplemented with high iodine and iron could cause much higher iodine and iron contents in egg.So,the laying hen could be used as an effectual biologic transporter to transfer iodine and iron from diet to egg.