2022.08.26 - 1774 viewed
This study was conducted to investigate the water quality, growth, survival rates and feed conversion ratio (FCR) when rearing common carp (Cyprinus carpio) fingerlings by using biofloc technology (BFT) with carbohydrate source from molasses (RĐ) and corn starch (BN). Common carp fingerlings (33.5 ± 1.15 g/fish) were randomly stocked in 9 tanks (267 l/tank) at a density of 150 fish/m3 (40 fish/tank) with three experiments: experiment 1 (BFT-RĐ) and experiment 2 (BFT-BN) were reared in biofloc system with molasses and corn starch, respectively, as a carbon source with C:N ratio of 20:1, whereas the control experiment (ĐC) was reared at similar intensity without biofloc technology and exchange 50% water/day. Fish was fed on demand with 35% protein diet. The result showed that after 60 days rearing water quality in BFT-RĐ was maintained better than that in BFT-BN and the control. The survival rate (98.33 ± 1.44%) and average daily weight gain (0.69 ± 0.05 g/fish/day) of common carp in BFT-RĐ were highest in BFT-RĐ (P <0.05) compared with the other treatments. Common carp in BFT-RĐ had the lowest FCR (1.53 ± 0.02) (P <0.05) compared to BFT-BN (1.58 ± 0.02) and the control (1.73 ± 0.03).
| File: | Tap chi so 8.3 biofloc.pdf | Tải về |
