Hydroponic watercress production through fish farming water reuse and varied nutrient solution recirculation times

ABSTRACT Aiming at a more sustainable food production, the reuse of effluent from fish farming in hydroponics can be viable option. Thus, objective present study was to evaluate effects use on development ‘Folha Larga’ watercress and possibility reducing fertilizer hydroponic system. The assay carried out greenhouse October 2021 February 2022 (two cycles). treatments were distributed randomized blocks, with four replications, split plots, consisting two times recirculation solution plots (T1 = 15 min operating by off T2 30 off) five solutions, subplots, obtained mixing different proportions (0, 25, 50, 75, 100%) nutrient farming. variables analyzed were: plant height, number leaflets, leaf area, SPAD index, fresh dry weight aerial part roots. reduces amount fertilizers for yield watercress. Nutrient time minutes is suitable