The effect of soybean meal substitution with Indigofera leaves and turmeric on carcass weight of Indonesian native chickens

This study aims to determine the effect of substitution of soybean meal with Indigofera (Indigofera zollingeriana) leaf flour (ILF) and turmeric (Curcuma longa) flour on the carcass weight of the native chickens. A total of 80 8-weeks-old Indonesian native chicken were fed 4 types of a ration containing ILF and turmeric flour to substitute soybean meal based on the completely randomized design with 5 replication. The formulated ration consisted of basal feed (R0), 10% of ILF and 2.5% turmeric flour (R1), 15% ILF and 2.5% turmeric flour (R2), 20% ILF and 2.5% turmeric flour (R3), respectively. At the end of the experiment, 2 chicken sample from each group were selected and slaughtered for further carcass characteristics measurement. Partial carcass percentages of the chest, thigh, and back were not affected by the substitution of soybean meal with ILF and turmeric flour in the ration, however, wing percentage was significantly higher in the group of chicken fed 15% of ILF and 2.5% turmeric flour (R2) compared to other groups.