Effects of Organic Mineral Chelates of Zinc, Manganese, and Chromium on Growth Performance, Physiological, Hematological, Intestinal Microflora, Immunological, and Bone Traits in Broiler Chickens

The study evaluated the effects of dietary organic chelates of zinc, manganese, and chromium on performance, carcass characteristics, blood biochemical parameters, hematological parameters and immune response, and the morphology of jejunum and tibia characteristics in broiler chickens. 420 one-day-old Ross 308 male broiler chickens were randomly allocated to 7 treatments with 4 replicates, and 15 birds per pen. The treatments were as follows: 1) Control treatment containing the organic zinc, manganese, and chromium (40 mg, 30mg, and 2mg/Kg feed, respectively), 2) treatment containing the organic zinc and manganese (40 mg and 30mg/kg feed, respectively), 3) treatment containing the organic zinc and chromium (40 mg and 2mg/ kg feed respectively), 4) treatment containing the organic manganese and chromium (30mg and 2mg/kg feed, respectively), 5) treatment containing the organic manganese (30mg/kg feed), 6) treatment containing the organic zinc (40 mg/kg feed), and 7) treatment the organic chromium (2mg/kg feed). The general linear model and Duncan test (p < 0.05) by the SAS software were used for statistical analysis of the collected data. The body weight gain and feed conversion ratio (FCR) in the starter phase were affected by the treatments (p <0.05). The treatment containing the organic chromium led to the highest body weight gain. The lowest FCR was observed in the treatment with the organic chromium. The organic zinc group had the highest villi width among all treatments (p <0.05). The control treatment had the highest blood glucose concentration. Also, all treatments decreased cholesterol in comparison to the control (p <0.05). The highest antibody titers against bronchitis were observed in the control treatment, as well as the highest percentages of ash and phosphorus. The current findings showed that organic chrome improved body weight gain and FCR in the starter phase, and that the use of organic zinc increased the villi width of the jejunum in broiler chickens.