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Can nitrogen reduction be used to increase seed potato minituber production in an aeroponic system?

Abstract Decreasing the nitrogen (N) supply in nutrient solutions can reduce the accumulation of plant biomass and increase yield. Little information, however, is available about the amount and proportion of N reduction, especially for different potato cultivars. The objective of this study was thus to determine the effect of N reduction in the nutrient solution (141.2, 106.2, 71.2 and 36.2 mg L−1) at various times (47, 62, 77 and 92 days after transplantation) on two potato cultivars (Agata and Asterix) grown in an aeroponic system. N reduction did not affect biomass accumulation by “Agata” plants but increased minituber yield by 17% compared to a control treatment (141.2 mg L−1). N reduction, though, affected the biomass accumulation by “Asterix” plants but did not affect minituber yield. These findings suggest cultivar specificity of N management (reduction) in plants cultivated aeroponically.