Twenty-four weaned male New Zealand white rabbits 4 weeks old, were used in the present study. Rabbits were randomly divided into three equal groups, 8 rabbit each, according to the type of drinking water. Group I received iodine- treated tap water .Group II received non iodine treated tap water ( control group ). Group III received non iodine treated ground water. Blood samples were collected from all animal groups every4 weeks from the onset of experiment for a duration of 16 weeks old to study the effect of drinking iodine- treated water, tap water and ground water on some blood parameters , thyroid hormones and growth performance in rabbits. The results indicated that ,concentrations of serum calcium, magnesium , sodium and copper levels showed a significant increase. However ,the levels of serum inorganic phosphorus and potassium were decreased in rabbits drank iodine treated tap water. Serum thyroxine (T4) and 3,5,3 triiodothyronine (T3) showed a highly significant increase. However, the values of serum total lipids, total cholesterol and creatinine concentrations were decreased. Serum albumin and glucose levels were increased after drinking iodine- treated tap water as compared with the untreated control group. A significant increase in body weight, daily body weight gain, carcass weight and some organs weights as liver and kidney were observed in iodine- treated tap water group . Regarding the effect of water sources (tap water and ground water) the obtained results indicated that, concentrations of serum calcium, magnesium and potassium showed a marked increase. However, the levels of serum inorganic phosphorus ,copper, and zinc showed a significant decrease after drinking ground water. The level of serum thyroid hormonse (T3 and T4) ,total lipids , total cholesterol and urea concentrations were decreased in rabbits drank ground water. However, the value of serum total protein ,albumin ,creatinine and glucose levels were increased as compared with untreated tap water (control group).There was no significant effect of water sources( tap and ground water) on live body weight,daily body weight gain,carcass weight and organs weight in rabbits drank ground water than those drank tap water . This study indicated that ,iodine added to the drinking tap water at the rate of 5ppm was improved the growth performance, thyroid functions and most related blood parameters investigated .This study also showed that,using drinking ground water to rabbits induced a significant changes in the level of most serum constituents . |
