Abstract
Aquaponics is an fusion production practice which combines aquaculture, the raising of fish, and hydroponics, a soil-less crop production method, to create a system that symbiotically produces both. Many of today’s coupled aquaponic systems (CAS) circulate water and nutrients from fish to plants and vice versa, but It is not always guaranteed that the fish preferences are completely aligned with the optimum requirements of the plants. This solution, which is referred to as decoupled aquaponic systems (DAS) would better secure optimal environmental conditions for both the plant and fish production units. The study examined the growth difference of leafy vegetables and Fancy carp between CAS and DAS method applying hybrid biofloc technology-aquaponics (HBFT-AP) water quality management for 14 weeks. Eight cultivars of european lettuce (fairly, decarte, gauguin, ezabel, ovired, volare, xaroma and skelton) were employed in the two experiment (EXP1 and EXP2) for 7~14 weeks. After planting leafy vegetables in two system, leafy vegetable productivity was compared at the end of growth period (25 days). Productivity (CAS vs DAS) was somewhat higher (total leaf weight; CAS 28,293 g vs DAS 26,087 g) in CAS for EXP1 period, but in EXP2, the total leafy weight was higher in DAS (71,247 g) than in CAS (67,749 g). Also, weight gain (%) value of fish was higher in fish group of DAS (33.09) than CAS (23.40) due to the higher feed supply in fish tank of DAS.
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