Effect of soil conditioner (UGmax) application on the content of phenols and glycoalkaloids in potato tubers

Abstract

The objective of the study was to determine the effect of the soil conditioner UG_max application on phenol and glycoalkaloid content in the tubers of two table potato cultivars. The following factors were examined: factor I − cultivars: Satina and Tajfun; factor II − five application methods of the soil conditioner UG_max: (1) control − no UG_max application; (2) 1.0 L/ha UG_max before planting; (3) 0.5 L/ha UG_max before planting + 0.25 L/ha at potato height of 10–15 cm + 0.25 L/ha in flower bud phase; (4) 1.0 L/ha UG_max before planting + 0.50 L/ha at potato height of 10–15 cm + in 0.50 L/ha in flower bud phase; (5) UG_max applied after emergence when plants were 10–15 cm high at the rate of 0.5 L/ha, and at the stage of flower buds at the rate of 0.5 L/ha. The highest concentration of phenols and glycoalkaloids was recorded in plots where UG_max was applied prior to potato planting at the rate of 1.0 L/ha, when plants were 10–15 cm high at the rate of 0.5 L/ha and at the stage of flower buds at the rate of 0.5 L/ha.