COMPARATIVE RESEARCH ON APPARENT DIGESTIBILITY OF TWELVE INGREDIENTS FOR JUVENILE CIRRHINUS MRIGALA

Apparent digestibility coefficients of dry matter (DM), crude protein (CP), crude lipid (CL), gross energy (GE), P, Ca, Mg, Zn, Cu, Fe and Mn in domestic fish meal (DFM), white fish meal (WFM), peanut meal (PNM), DDGS, chicken meal (CM), rice bran (RB), cottonseed meal (CSM), rapeseed meal (RSM), soybean meal (SBM), corn gluten meal (CGM), corn DDGS (CDDGS) and feather meal (FTM) were determined for juvenile Cirrhinus mrigala (3.88±0.06) g. The results showed that apparent digestibility of dry matter, crude protein, crude lipid, gross energy, P, Ca, Mg, Zn, Cu, Fe and Mn of twelve ingredients were among 24.93%-85.68%, 50.02%-97.40%, 51.89%-94.02%, 39.18%-96.39%, 9.72%-87.37%, 3.47%-25.92%, 26.11%-88.25%, 12.63%-66.35%, 41.33%-104.86%, 10.69%-91.84%, and 4.42%-85.49%, respectively. DFM and WFM had the highest apparent digestibility of dry matter, crude protein and gross energy. In other ingredients except for fish meal, PNM, SBM and CGM had the highest apparent digestibility of dry matter. PNM had the highest apparent digestibility of crude protein. RB and PNM showed the highest apparent digestibility of crude lipid. PNM and CM had the highest apparent digestibility of gross energy. DDGS showed the lowest apparent digestibility of dry matter, crude protein, crude lipid, and gross energy. As for apparent digestibility coefficients of minerals, FTM had the highest apparent digestibility of P, Cu, Fe and Mn. RB had the highest apparent digestibility of Zn. WFM, SBM and FTM had the highest apparent digestibility of Ca. SBM, FTM and CDDGS had the highest apparent digestibility of Mg. CM had the lowest apparent digestibility of P, Ca, Mg and Fe. PNM and CSM had the lowest apparent digestibility of Zn. RSM showed the lowest apparent digestibility of Cu and DDGS had the lowest apparent digestibility of Mn. These results indicate that PNM, SBM and CGM are good protein sources for juvenile C. mrigala to replace fish meal, and that RB could be used as superior energy source, and that FTM could be considered as the potential source of minerals, and that DDGS showed the lowest nutritional value for juvenile C. mrigala among all the selected ingredients.