Authors: A. A. VASILIEV, doctor of agricultural sciences, scientific secretary, A. K. GORBUNOV, researcher, head of the laboratory of elite seed potatoes, Ural Federal Agrarian Research Center of Ural branch of Russian Academy of Science (112, bldg. A. Belinskogo Str., 620142, Ekaterinburg; phone: +7 906 870-53-12, +7 902 611-76-09; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Keywords: potato, seed productivity, nutrition level, planting time, planting density, landing depth.
Abstract: The influence of various methods of potato farming on seed productivity of the early variety “Rozara” and middle-aged variety “Kuzovok” was studied. During the study period, this indicator mainly depended on the density of planting (the con- tribution of the factor – 67.1 %), the level of mineral nutrition (20.4 %) and the genotype (7.2 %). In the wet conditions of 2015
(SCC = 1.60), the influence of the seed embedment depth (17.3 %) increased, in the arid 2016 (SCC = 0.93) the nutrition level (41.0 %) increased, and in a fairly wet 2017 (SCC = 1.44) – varieties (30.8 %) and planting dates (8.1 %). The optimal combi- nation of agricultural methods was established, which provides the highest harvest of tubers of seed fraction per unit area – thickened planting (75×19 cm) on the increased background of mineral nutrition: for the variety “Kuzovok” – June 5–12 to a depth of 10–12 cm (404 ths. pcs/ha), and for the variety “Rozara” – May 25–29 to a depth of 5–6 cm (378 ths. pcs/ha) and 10–12 cm (383 ths. pcs/ha). The thickening of the plantings from 49 to 70 thousand tubers per 1 ha increased the seed productivity
of the “Rozara” variety on average by 36.7 %, “Kuzovok” – by 25.8 %. The increase in the mineral level was accompanied by an increase in this indicator in the “Rozara” variety by 21.4–30.8 %, and the variety “Kuzovok” – by 18.9–30.3 % compared to the control (without fertilizers). An early planting (May 5) led to a decrease in the collection of tubers from the seed frac- tion per hectare of “Rozara” variety, on average, by 41.1 % compared with planting in the second decade of May, by 49.2 % compared with planting at the end of May, and in “Kuzovok” – by 14.1 and 26.0 %, respectively. Deep embedding of planting material contributed to a significant increase in seed productivity of potatoes during the late planting season of the “Rozara” variety – by 3.8%, “Kuzovok” – by 10.1 %.
