The study aimed to know the effect of adding urea, molasses, and malic acid to straw, fermenting it and replacing it with concentrated feed at rates of (10, 20, 30, and 40%) on some productive traits live weights, total and daily weight gain, feed intake and feed efficiency and carcass characteristics such as hot carcass, dressing percentage ratio, major joints (neck, shoulder, rib, loin, leg and fat-tail) as well as internal organs and inedible organs. The results were superior to the second treatment (10%) of fermented straw over the rest of the groups in characteristics live weights, total and daily weight gain, feed intake and feed efficiency and carcass characteristics live weights, total and daily weight increases, dressing percentage ratio, feed efficiency, hot carcass weight, clearance ratio and in some weights of joints