INFLUENCE OF PLANTING SCHEMES ON THE PRODUCTIVITY AND QUALITY OF POTATOES IN THE REPUBLIC OF KHAKASIA

Abstract

. The influence of potato planting patterns on yield and quality was revealed in the steppe zone of the Republic of Khakassia on dark chestnut soils. In addition, varieties of Siberian selection of different maturity groups were studied as an object of study: Krasnoyarsk early - early ripening, Tanai - medium before, and Nakra - mid-ripening. The experiments were laid in 2020 - 2022 on light sandy, loamy dark chestnut soils with a humus content of 2.8% at a slightly alkaline pH. The technology recommended for the steppe zone of Khakassia was used for cultivation. Potato planting schemes were selected for cultivation for food and seed purposes. During the years of research, the average monthly air temperatures during the growing season were close to the long-term averages. The amount of precipitation was close to the norm. However, there were also significant excesses (July 2020 - 268%) and half the bars (July 2021). A decrease in the feeding area increased the height of plants due to a lack of light, with a significant reduction in the parameter of the average leaf area to 12.6%. Due to the optimal feeding area choice, the yield increase was from 1.9 to 3.2 t/ha. The variation in the yield between the planting patterns of varieties of different ripeness groups ranged from 22.7 to 30.5%. Statistical calculations showed that the yield value depends on the array by 21.6%, by 28.5% - from the planting pattern and by 22.8% - from the conditions of the growing season. With the decreased distance between plants in a row, dry matter and starch content increased, and the amount of vitamin C in tubers increased. However, the accumulation of nitrates by tubers in all variants of the experiment and all varieties did not exceed 126 mg/kg at the maximum allowable concentration of 250 mg/kg.