Study on the effect of dissolved oxygen on common carp and basil in aquaponics system

Aquaponics is an integrated system that combines fish farming (aquaculture) and hydroponic plant production. The objective of this study was to examine how the level of dissolved oxygen with or without an air pump affects water quality, fish output, and plant growth parameters for common carp (Cyprinus carpio) and basil (Ocimum basilicum). Ebb – and flood aquaponics systems (with automatic siphon) were used.

Two treatments were set in this experiment, one of which was the aquaponics system without air pump (unit I), where the water of the plant bed was pumped in two directions, one falling back to the fish tank oxygenating the water the other was pumped to the hydroponics unit. The other system (unit II) was designed with an air pump. In the course of the study, water quality parameters, such as oxygen saturation, dissolved oxygen (DO), electrical conductivity (EC) and nitrite, were significantly different (p<0.05).

Total basil biomass was higher in unit II. (5367.41 g). The final biomass of common carp was 2829.45 g ± 79.24 and 2980.6 g ± 64.13 g in unit I and unit II, respectively. Weight gain (WG) and specific growth rate (SGR) showed no significant differences (p>0.05) between the treatments.

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Homoki, Dávid & Toviho, Odunayo & Minya, Dániel & Kovács, László & Lelesz, Judit & Pèter, Bársony & Fehér, Milán & Kövics, G(yörgy) & Stündl, László. (2021). effect of dissolved oxygen on common carp (Cyprinus carpio) and basil (Ocimum basilicum) in the aquaponics system. Acta Agraria Debreceniensis. 89-96. 10.34101/actaagrar/1/8933. 

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