Investigation of Growth, Immunity and morphology of jejunum indices in broilers fed black seed

The use of medicinal plants has long been important in human, animal and poultry health and in recent years to improve the functioning of the immune system and gastrointestinal tract have received more attention. This experiment was performed to investigate the effect different levels of black seed on growth indices, blood parameters and morphology of broiler jejunum. This experiment was performed with 250 308 Ross chickens in a completely randomized design with five treatments and five replications. Blood samples were taken to determine blood parameters at42 days of age. Blood samples were taken on days 21 and 28 to evaluate the immune system after injection of 0.5% of sheep red blood cells at seven and 14 days. Addition of 0.5% of black seed significantly improved body weight gain and feed conversion ratio. Decreased cholesterol and triglyceride, increased HDL and bilirubin were observed with the addition of black seed. There was no significant difference in total immunoglobulin, immunoglobulin M and immunoglobulin G at 21 and 28 days. Consumption of different levels of black seed, jejunum morphological variables including villi length, villi width, crypt depth, villi area, villi density and area of adsorption area increased significantly. The results of this experiment showed that the addition of black seed up to one percent improves the growth performance of broilers.