Zmiany w zawartości węgowodanów i kwasu askorbinowego w rzodkiewce wywołane stresem glinowym

The objective of the research was to examine an effect of Al stress appearing under conditions of differentiated NPK fertilization on carbohydrate and ascorbic acid contents in radish thickenings. The relations between aluminium content and nitrogen, phosphorus and potassium concentration in the substrate observed throughout plant vegetation season affected carbohydrate and ascorbic acid contents in radish thickenings. It was proved that with growth of Al the contents decrease of both compounds decreased. This drop was noted more clearly at a single NPK dose application. However, a double dose of nitrogen, phosphorus and potassium partly neutralized unfavourable effect on the plants. It was manifested by higher contents of ascorbic acid and carbohydrates in radish thickenings.