Abstract

This study conducted to clarify the effect of dietary supplementation of organic chromium (Cr), selenium (Se) and their combination on performance, immune responses, hematological and biochemical parameters as well as antioxidant capacity of Japanese quails (Coturnix japonica) under heat stress. A 90-day trial conducted using seventy-five, 10-day- old Japanese quails that randomly divided into 5 groups of 15 birds each. The 1st group received basal diet and was kept in a temperature controlled room at 24°C . The other four groups reared under natural summer months and kept in a room temperature ranged from (25.3°C to 36.7 °C).The 2ndgroup kept under heat stress condition and fed basal diet only. The third, fourth and fifth groups fed basal diet supplemented by chromium (1400 µg/kg of diet), selenium (0.3 mg/kg of diet) and their combination respectively. In heat-stressed quail group, the data of growth performance revealed a significantly (P

Key words: Quails, Heat stress, Organic selenium and chromium, Immune response, oxidative stress