Ключевые слова: mathematical modeling, factors of plant habitat, food regime, soil humidification, crop

// Мелиорация.— 2022. – №4(102) – С 45–54

Various variants of the representation of the indicator of the water regime of plants in the mathematical model of crop productivity have been analyzed. It is shown that it is most approprite for the conditions of Belarus to use monthly precipitation amounts as this indicator. The results of checking the mathematical model of sugar beet yield according to the 10-year data of the Shchuchinsky State Export site (sugar beet of NZ-type) confirmed a sufficiently high accuracy of mathematical modeling. The coefficient of determination when comparing the measured and calculated yields, even without taking into account precipitation, was 0,87. Taking into account the water factor (precipitation) increased this coefficient to 0,91. Modeling the relationship of sugar beet yields with two crop-forming factors (food and moisture) allowed us to establish the optimal distribution of precipitation during the growing season (May - September) with a total amount of 410 mm for this period. According to the Shchuchin weather station, it was found that precipitation falling at the beginning of the growing season (May – June) has the greatest impact on the yield of sugar beet.