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This research aimed to study the effect of the use of fermented palm kernel meal (FPKM) with  Bacillus subtilis  in the ration on the performance of broiler ducks. This study used 100 DOD of Mojosari and Alabio crossbred ducks. The types of cages used were 20 units of box cages measuring 80x80x60 cm and each unit was filled with 5 ducks. This research used a completely randomized design (CRD) experimental method with five ration treatments and four replications. The diet treatments were given 0, 20, 25, 30 and 35% FPKM respectively. The ration was prepared with an 18% protein, and 2700 kcal/kg energy. The variables were observed: feed consumption, body weight gain, feed conversion, body weight, carcass percentage and abdominal fat percentage. The results of variance analysis showed that the utilization of FPKM with Bacillus subtilis in the ration had a significantly different effect (P 0.05) on feed conversion and percentage of ducks abdominal fat. From the results of this research it can be resumed that the utilization of FPKM with Bacillus subtilis can only be used up to 30% in duck rations seen from the consumption of rations 689.48 g/head/week, weight gain 145.50, conversion of 4.75 rations, body weight of 1158, 50 g/head, the percentage of carcasses was 61.85% and the percentage of abdominal fat was 0.88%.

The Duck Responses to the Diets Containing Fermented Palm Kernel Meal with Bacillus subtilis