Lalu Wira Pribadi
The optimum level’s of Premix-Protein supplementation in basal diet consist of native grass and rice bran for Bali cattle fattening has been investigared by with treating dietary that containt 0.00; 1.00 ; and 1.50kg Premix protein each sabjected to 5 head of uniformly male Bali cattle. whole number of cattle used in the experiment were 20 head. The experiment designed to Completely Randomized Block Design with 4 treatments each consist of 5 replication units. Data analysed by using analyses of Variance and futher test by using Duncan’s New Multiple range Test. Determining the optimum level’s of the premix – protein based on the treatmen that given highest ADG and feed efficiency values. Resulties of the experiment shows that suplementation of premix-protein in basal diet for Bali cattle fattening were significantly (P<0.05) could promote the Bali cattle growth rate and feed efficiency; group of Bali cattle that consumed diet which contain premix-protein shows ADG 0.603 kg’s a head, then the control group shows ADG 0.357 kg’s a head. This mean that supplementation the Premix-Protein in basal diet for Bali cattle fattening could promote 63.94% daily gain. Supplementation of Premix-Protein in basal diet consist of 83.0% native grasses and 13% rice bran, were optimum at the level’s of 1.0 kg/head/day on both growth rate and feed efficiency of male Bali cattle.