The Effect of Used of Soy Sauce Waste in the Ration on Yolk Chemical protein, fat and calcium of Mojosari Laying Duck

The aim of this study was to examine the effect of soy sauce waste in the ration on protein, fat and calcium content in the yolk of Mojosari laying duck. The animals used were 240 Mojosari laying ducks at 20 weeks old with the average of body weight were 1,385.0 ± 130.85 g (CV = 9.44%). Feed materials used were corn, rice bran, soybean meal, fish meal, wheat pollard, premix and soy sauce waste. The experimental design used was a completely randomized design (CRD) with 4 treatment and 6 replications so that there were 24 experimental units and each consists 10 ducks. The treatments were soy sauce waste at level T0 : 0%, T1: 5%, T2: 7,5% and T3: 10%. The data were analyzed using analysis of variance (ANOVA) and Significant differences were denoted as P