Influence of foliar feeding with ultramicroelements on the productivity of anthocyanin-containing potato varieties in greenhouses

. The aim of the study is to study the effect of Se – EDTA and potassium iodide on the growth, development and productivity of potato varieties Surprise and Northern Lights. The scheme included: Factor A – Grade: A1 – Surprise, A2 – Northern Lights; Factor B – 2-fold foliar top dressing with solutions of ultramicroelements: B1 – Control (without top dressing); B2 – Se – EDTA; B3 – KI. The effect of the ultramicroelements Se – EDTA and KI on the leaf mass and leaf supply of potato varieties Surprise and Northern Lights at the beginning of the growing season, as well as on the average weight of 1 minicube and the dry matter content in them at the end of the growing season was revealed. At the same time, the degree of reaction depended on the variety. In the Surprise variety, the use of both Se – EDTA and KI increased the size of tubers by 1.8…2.2 g or 14.9–18.4%, and the dry matter content in them by 1.1–1.7%. In the Northern Lights variety, when using KI, the increase in tuber size by 1.6 g or 23.4% was canceled, and when using both Se – EDTA and KI, an increase in the dry matter content in minitubers by 1.1–1.4%. The increase in the values of these indicators was probably caused by the active supply of assimilants to minitubers due to the increased photosynthetic activity of plants at the beginning of the growing season: an increase in the absolute and relative mass of leaves, as well as the chlorophyll content in them.