Four feeding trials were conducted to investigate the effects of using different levels of black pepper of medicinal plant on performance, carcass characteristics and blood biochemical were studiedinJapanese quails. A total of 500 Japanese quails were divided into 4 groups and 5 repetitions with 25 quails each.G1), First group as control group did not receive any black pepper, G2) 1% of black pepper, G3) 1.5% of black pepper, G4) 2% of black pepper.The results showed that using black pepper in their diet had significant effects on performance, carcass traits and blood biochemical parameters of quails (p<0.05). The highest amount of daily feed intake andbody weight gain was observed in the group 4also the highest percent of breast was observed in experimental group4.The results showed that serum total cholesterol and triglycerides concentration were significantly reduced in groups of 3 and 4 compared to the control group (P<0.05). But there is no effect on total protein and albumin.
