Summary
This field trial evaluated two mini tomato cultivars grown in recirculation hydroponic systems using raw rice husk as substrate, testing the effects of partial defoliation on agronomic and quality traits. The Cherry cultivar performed better for biomass and yield metrics, whilst the Grape cultivar accumulated higher sugars; partial defoliation tolerance differed by cultivar, with the Cherry requiring intact leaf structure for optimal production. The trough system promoted growth and yield, whereas pot systems enhanced fruit sugar concentration.
Regional applicability
This work was conducted in Brazil and focuses on controlled hydroponic production with recirculating nutrient solutions — a system type more common in protected horticulture in temperate climates but transferable to United Kingdom greenhouse operations. The cultivar-specific responses to defoliation and substrate type may inform UK protected cropping strategies, though local cultivar choices and climate control conditions would require adaptation.
Key measures
Plant growth, fruit yield, mean fruit size, sugar concentration (Brix), sympodium leaf removal effects in two cultivation systems (pots and troughs) using rice husk substrate
Outcomes reported
The study compared plant growth, fruit yield, and fruit quality in two mini tomato cultivars (Cherry Hybrid Wanda and Grape Hybrid Dolcetto) across two hydroponic systems and three defoliation levels. Cultivar performance differed significantly, with the Cherry cultivar showing higher yield and size but the Grape cultivar producing higher sugar concentration.
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