Apparent Digestibility Coefficient of Differently Processed Lima Bean ( Phaseolus lunatus L.) For Clarias gariepinus Juveniles

摘要

Apparent Digestibility Coefficient (ADCs) of crude protein , lipid and energy in differently processed lima bean ( Phaseoluslunatus ) were determined for Clarias gariepinus (13.57±0.07 g). Raw (RLM), boiled (BLM), soaked (SLM), autoclaved (ALM) and toasted (TLM) Lima bean were the test ingredients. Test diets contained 70% reference diets and 30% of test ingredients, with chromic oxide as the inert marker. All treatments were replicated. Fish were fed twice daily and excess feed siphoned out 30 min after each feeding, while faecal collection was done 8 h after every feeding. The digestibility coefficient of nutrients were calculated using proximate analysis of diets and faeces carried out for crude protein , energy, lipid and phosphorus. Apparent digestibility coefficients of energy was lowest in SLM and showed no significant difference among other treatments (0.05). ADCs of crude protein was highest in BLM (88.01%) and lowest in ALM. There were significant difference in all treatments (0.05). ADCs of phosphorus was highest in BLM closely followed by ALM and showing no significant difference (0.05).The least ADC phosphorus value was recorded in RLM. ADCs lipid was highest in BLM and showed significant difference with SLM and ALM (0.05). FCR for ALM varied significantly (0.05) from other treatment. Clarias gariepinus can effectively digest boiled and toasted Lima bean seed, with both treatments having better ADCs for protein, lipid, energy and phosphorus.