Feeding Fermented Jatropha curcas L. Meal Supplemented with cellulase and Phytase to Kampong Chicken
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Fermented Jatropha curcas meal using Rhizopus oryzae could decrease the fat contained in the meal (5.8% Vs 0.39) and eliminated trypsin inhibitors up to 67.95 %. The decreasing of fat content indicated the eliminating of the main toxic substance contained in the meal, i.e. phorbolesters. Most of the phorbolesters could be extracted with the oil fraction of the Jatropha curcas meal. Hopefully, this treatment could convert the toxic jatropha curcas meal to high quality of meal as poultry feed. However, the fiber and phytate contained in the meal were still high. This experiment was conducted to study the effects of using fermented Jatropha curcas meal supplemented with cellulase and phytase in the kampong chicken diets on the growth and mortality rate. The experiment used 200 kampong chickens and were reared from day old chicks up to 10 weeks of age. This experiment using completely randomized design with 5 treatment diets and 4 replications, each replication used 10 birds. The experimental diets were: T0 (control diet, without Jatropha curcas meal), T1 (the diet contained 5% untreated Jatropha curcas meal), T2 (the diet contained 5% fermented Jatropha curcas meal + cellulase 200 ml/ton of feed), T3 (the diet contained 5% fermented Jatropha curcas meal + 1000 FTU phytase), and T4 (the diet contained 5% fermented Jatropha curcas meal + cellulase 200 ml/ton + 1000 FTU phytase). The parameters observed were feed consumption, body weight gain, final body weight, feed conversion ratio, and mortality rate. The data were analysed using analyses of variance. The results showed that there was no significant different on the parameters observed due to the treatments. However, feeding untreated Jatropha curcas meal in the diets (T1) decreased the body weight gain approximately 10.52% and final body weight approximately 10.13% compared to the control (T0). Feeding fermented Jatropha curcas meal supplemented with cellulase + phytase(T4) yielded the final body weight and feed conversion ratio similar to those of the control (T0) diet. The values of the final body weight of the T0, T1, T2, T3 and T4 were 955.08 g/bird, 858.33 g/bird, 872 g/bird, 935 g/bird, and 951.25 g/bird, respectively. The values of the feed conversion ratio of the T0, T1, T2, T3 and T4 were 2.93, 3.51, 3.49, 3.20, and 2.89, respectively. The values of the feed consumption per bird during 10 weeks of the T0, T1, T2, T3, and T4 were 2567.53 g, 2663.76 g, 2752.32 g, 2685.05g, and 2520.5 g, respectively. There was no mortality observed for all treatments.