THE IMPLEMENTATION OF Saccharomyces Spp.N-2 ISOLATE CULTURE (ISOLATION FROM TRADITIONAL YEAST CULTURE) FOR IMPROVING FEED QUALITY AND PERFORMANCE OF MALE BALI DUCKLING

Three isolates of Saccharomyces spp (Sc.N-2, N-7, and G-9) were isolated from traditional yeast product samples in the first experiment. Hence, the current research was conducted in order to implement isolate Saccharomyces spp. N-2 culture for fermenting of rice bran to increase rice bran quality and growth performance of male Bali duckling up to eight weeks of age. One hundred day-old-duck (DOD) of male local Bali drake (Anas sp) were assigned to 4 treatments in a completely randomized design. Each treatment consisting of five replications with five birds per replication. The average body weight had no significant differences among the four groups at the beginning of the experiment. The treatments were (i) control diets with 10% unfermented rice bran; (ii) diet containing 10% fermented rice bran; (iii) diet containing 20% unfermented rice bran; and (iv) diet containing 20% fermented rice bran by Saccharomyces spp.N-2 isolate, respectively. Experimental diets and drinking water were provided ad libitum during the entire experimental period (for a 8week periods). Body weight and feed intake were recorded weekly. The study showed that fermentation of rice bran using Saccharomyces spp. N-2 culture could improve digestability of its dry matter (DM), organic matter (OM), crude protein (CP), crude fibre (CF), and increased the metabolizable energy of rice bran. There were no significant differences (P<0.05) between the treatments on feed consumption. However, birds consumed fermented rice bran had higher final live weight, live weight gain (LWG)s and were efficient in using feed compared to those fed unfermented rice bran in their diets (P<0.05). Increasing the amount of rice bran in the diet either fermented or not with Saccharomyces spp. N-2 culture could decrease LWGs and feed conversion ratio of the birds. Total cholesterol content in blood serum of the birds decreased significantly omit different (P<0,05) by feeding with fermented rice bran and increasing the level of rice bran in diets (P<0.05). It was concluded that nutrient composition and digestibility of rice bran might be improved by fermentation using Saccharomyces spp. N-2 culture and its utilization in the diet could increase growth performance and feed efficiency of male Bali duckling. Moreover it decreased the serum cholesterol contents of male Bali duckling. Key words: Saccharomyces spp., feed quality, crude fiber, digestibility, Bali duckling.