Effect of soil conditioner (UG<sub>max</sub>) 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<sub>max</sub> 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<sub>max</sub>: (1) control − no UG<sub>max</sub> application; (2) 1.0 L/ha UG<sub>max</sub> before planting; (3) 0.5 L/ha UG<sub>max</sub> 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<sub>max</sub> before planting + 0.50 L/ha at potato height of 10–15 cm + in 0.50 L/ha in flower bud phase; (5) UG<sub>max</sub> 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<sub>max</sub> 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.