Influência do tipo de ração no funcionamento de um mini sistema de aquaponia

Abstract

Aquaponics is a sustainable system that combines fish farming with plant cultivation in a symbiotic cycle. In this cycle, the waste produced from fish farming is transformed into essential nutrients for plant growth through microbial interactions. The absorption of these nutrients contributes to the improvement of water quality used in the system. Based on this information and considering the need to understand the various biotic and abiotic interactions that occur in this production method, the objective of this study was to evaluate the growth of fish and vegetables, as well as some chemical parameters and the phytoplankton community of a mini aquaponics system. The experiment used 6 boxes with a capacity of 100 liters each, equipped with submergedpumps of 500L/h and filled with expanded clay beds (30L). In each box, 3 individuals of Goldfish (Carassius auratus) were introduced, as well as lettuce and basil plants. Two types of fish feed were tested, extruded (T1) and in powder form (T2), in an experimental design of two treatments with three repetitions, which were monitored for 150 days. Samples of limnological parameters and the phytoplankton community were also collected. We observed that the type of feed did not influence the results of the limnological parameters or the growth of Goldfish under the tested experimental conditions. However, considering the results obtained in the characterization of the phytoplankton community and plant growth, we concluded that treatment 1 showed a higher richness of the phytoplankton community and better growth of basil. Thus, in a recommendation for feed choice, treatment 1 of extruded feed benefited more components of the system than treatment 2 of powdered feed.