Can the combination of biofloc technology and probiotic application improve feed utilization and production of Nile tilapia (Oreochromis niloticus)?
15/02/23 03:23PM
Phan, Loan P; Le, Hang T T; Tran, Hoang K; Nguyen, Phuong T.  Aquaculture, Aquarium, Conservation & Legislation; Cluj-Napoca Vol. 15, Iss. 1, (Feb 2022): 424-435.
Abstract: Biofloc technology (BFT) and probiotic application are widely used in aquaculture. This study aimed to assess the effects of combined BFT and probiotic application on intensive tilapia culture in modified earthen ponds, namely, high-density polyethylene (HDPE) dyke and bottom lined pond (DBL); HDPE bottom lined pond (OBL); and no HDPE lined pond (NoL). A trial was conducted for 150 days in the three mentioned pond types in triplicate. The pond had 200 m2 and 1.5 m in depth. Mono-sex tilapia fingerlings (sizing 3.20 ± 0.89 g each) were stocked with a density of 5 fish m-2. Biofloc booster was applied into the ponds at the rate of 5 mg L-1 per day for the first month. Thereafter, the ponds were supplied the mixed Bacillus spp. probiotic at a dose of 10 g per 100 m2 every 10 days, and molasses (C = 37.5%) at a dose of 3.5 g m-3 weekly. The growth performance of tilapia in the DBL ponds was significantly higher (p < 0.05) than those in the OBL treatment, but not significantly different from those in the NoL treatment. The lowest survival rate (66.6%) of the fish in the OBL treatment compared to those in the other treatments. Feed conversion ratio was low (1.27) for all ponds. The quality of the harvested fish was evaluated as excellent. This study proves that the combination of BFT and probiotic application could improve the efficiency of tilapia farming in earthen ponds.