The effect of complementary nutrient solutions in coupled and decoupled aquaponics
Aquaponic systems are an integrated closed-loop multi-trophic food production system that combines elements of a recirculating aquaculture system (RAS) and hydroponics. Aquaponic systems where the nutrient flows and concentrations within the different components (e.g., aquaculture and hydroponic parts) are independent of one another are called decoupled aquaponic systems (multi-loops) (DAPS), or double recirculation aquaponic systems (DRAPS). The other type of aquaponics, that is, coupled aquaponic in which the water passes from the aquaculture component to the hydroponic component and then back to aquaculture and has a single-loop. Fish waste provides plant nutrients in coupled aquaponics, whereas aquaponic systems designed with independent loops offer greater control over the hydroponic component, where water can be complemented with mineral salts for increased nutrient concentrations and formulated by adjusting pH. On the other hand, minerals in used water can reduce nutrient uptake of plants (antagonistic effect) and the deficient nutrient element should be added externally. In this study, the required nutrient formulations for plant development and growth will be calculated and their effects will be investigated.
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