The dietary treatments were as follows; T1 = 0 g MUP/day;
T2 = 200 g MUP/day; T3 = 400 g MUP/day; and T4 = 600 g MUP/day. All animals were kept in
individual pen and concentrate was offered at 5 g/kg of body weight (BW) daily. The experiment
was conducted for four periods, and each period lasted for 21 days. During the first
14 days, all animals were fed with respective diets and rice straw was fed ad libitum