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The issue of grape plants adaptation to current and future climate changes is acute. Agrobiological records conducted in vineyards at the beginning of the growing season show the possible productivity by the values of the fruitfulness coefficients (k1 and k2). The adaptation of plants is higher in varieties with high values of the fruitfulness coefficients, so it is important to determine their relationship with the weather conditions of the territory. The aim of this work was to study the influence of weather conditions in the south Russia on the grapes fruitfulness coefficients of thirteen Vitis Vinifera varieties of domestic breeding AZESVW and NCZSRIHV for the period 2007-2020 by the method of correlation analysis. A large relationship between the parameters of fruitfulness k1 and k2 with the temperature of the previous year (especially with the minimum air temperature and temperature range), and a smaller one with the characteristics of moisture availability, was revealed. The influence of winter meteorological conditions was noted in the correlation analysis of all the data, for individual varieties, due to frost resistance, the dependence was not significant. In general, there is a variety-specific correlation.

Impact of the south Russia weather conditions on the fruitfulness coefficients of domestic breeding grape varieties