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Formulation of versatile diets to adjust the N: P: K ratio in aquaponic nutrient solutions: performance and health of Nile tilapia juveniles, and quality and quantity of lettuce biomass production

Grant number: 22/03916-5
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): April 01, 2022
Effective date (End): December 31, 2022
Field of knowledge:Agronomical Sciences - Fishery Resources and Fishery Engineering - Aquaculture
Principal Investigator:Brunno da Silva Cerozi
Grantee:Vitória Tozo Langue
Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Associated research grant:17/14269-2 - A protocol to develop a nutrient dynamics model for aquaponics systems through a mass balance analysis, AP.JP

Abstract

In general, aquaponic solutions are deficient in micronutrients, phosphorus and potassium. Fish diets used in aquaponics can be modulated for the generation of versatile feeds that can meet the nutritional requirements of fish without compromising the performance and health of the animals, while ensuring sufficient generation of nutrients for the production of plants. Potassium phosphate (KH2PO4) is a great candidate to be evaluated in the formulation of versatile feeds due to its high bioavailability and its wide use a fertilizer in conventional hydroponics. Three inclusion levels of KH2PO4 (0, 3, and 6%) in diets for tilapia will be tested and performance and health parameters will be evaluated, as well as the production and quality of hydroponic lettuce biomass grown with effluent from the system. (AU)

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