Usanova Z.I., Migulev S.P., Pavlov M.N.

Productivity of potato varieties when using foliar top dressing in the conditions of the Upper Volga region

The results of studies carried out in 2019 - 2021 are presented. on sod-podzolic, slightly loamy, well-cultivated soil. The experiment scheme included: Factor A - Variety: 1 - Colomba, 2 - Queen Anne, 3 - Red Scarlett, 4 - Gala. Factor B - Foliar application with drugs: 1 - Control (treatment with water), 2 - Zircon (30 ml/ha), 3 - Epin-Extra (15 ml/ha), 4 - Folirus Premium (7 l/ha), 5 - Aquamix (220 g/ha), 6 - Aqueous solution of Zn-EDDSA complexonates (concentration 0.933 g/l) + Cu-EDDSA (concentration 0.933 g/l). The Gala variety was characterized by the highest productivity, which accumulated an average of 30.7 t/ha of tubers, which is 3.6 t/ha (13.3%) more than the Colomba variety. The varieties Red Scarlett and Gala were characterized by a higher content of dry matter and starch. In terms of the amount of crude protein in tubers, the Koroleva Anna variety had an advantage, in which its content was 1.7% higher than that of the Colomba variety. The largest increase in yield was provided by foliar top dressing with Zircon growth regulator and a mixture of Zn-EDDAC + Cu-EDDAA complexonates, which on average for varieties amounted to 4.3 - 4.4 t/ha (17.7 - 18.1%), which is explained by the creation more powerful photosynthetic potential of agrocenosis in these variants. In terms of dry matter and starch content, the largest gains in the Gala variety were obtained from foliar dressings with Epin-Extra, Folirus-Premium and Aquamix (0.7 - 1.4% and 1.9%). Zircon and Complexonates Zn + Cu EDDIAC increased the amount of crude protein by 0.7 - 0.9% in the Colomba variety.

Keywords: POTATOES, VARIETIES, PRODUCTIVITY, CROP STRUCTURE, TUBERS, CROP QUALITY