The effect of replacing of mineral iodine supplement with organic iodide in diet on performance and blood metabolites of Broiler chickens

This experiment was performed to evaluate the different ratios of organic and inorganic Iodine (0:100, 25:100, 50:50, 75:25, 100:0) on the performance, blood parameters and serum thyroid hormones in broiler chickens in a completely randomized design with 5 treatments were tested in 5 replicate pens. The results showed that there was no significant difference between treatments in weight gain, feed intake and feed conversion ratio. The highest concentrations of T3, TSH and TRH were detected in 75% organic Iodine treatment (p < 0.05). The diet contained 100% organic Iodine was highest concentrations of tetraiodothyronine (T4) among treatments (p < 0.05). In blood serum, chicks fed with a diet containing 75% organic Iodine treatment were found to have the highest levels of glucose, total protein, nitrogen urea and superoxide dismutase, glutathione peroxidase enzymes (p < 0.05). However, there was no significant difference in the concentration of creatinine and uric acid blood. Generally, according to the results of this experiment, the replacement of mineral supplement with organic supplementation of iodine without negative effects, affected on blood parameters and concentration of thyroid hormones, so that the highest concentration in treatment of 75%organic iodine + 25% inorganic iodide was observed.