日粮碘铁水平与蛋鸡血浆、肝及蛋碘铁含量的相关性研究

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

将 30羽 2 78日龄罗曼蛋鸡随机分成 3组 ,以日粮含 I0 .5 mg/ kg,含 Fe2 5 mg/ kg(对照组 ) ,含 I5 0mg/ kg,含 Fe5 2 5 m g/ kg(试验 组 ) ,含 I10 0 m g/ kg,含 Fe10 2 5 m g/ kg(试验 组 )饲喂 8周 ,观察日粮中碘铁在产蛋母鸡体内的转运及日粮碘铁水平与产蛋母鸡血浆、肝及蛋碘铁含量的关系。结果表明 ,与对照组比较 ,试验 组和 组血浆碘含量增加了 15 3%和 2 0 1% ,蛋黄碘含量提高了 1395 %和 176 2 % ,蛋白碘含量提高了 12 1%和187% ;血浆铁含量增加了 115 %和 142 % ,蛋黄铁含量提高了 77%和 12 4% ,肝铁含量提高了 10 5 %和 149% ,蛋白铁含量和肝碘含量未发现明显变化。相关性检验表明 ,日粮碘与血浆碘、蛋黄碘及蛋白碘 ,血浆碘与蛋黄碘及蛋白碘 ,日粮铁与血浆铁、肝铁及蛋黄铁 ,血浆铁与肝铁、蛋黄铁 ,均呈强正相关 (P<0 .0 1)。这些结果提示 ,通过高碘高铁日粮可以大幅度提高蛋中碘铁含量 。

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.