Abstract
The authors assess the influence of meteorological factors on the yield of Festulolium seeds. The analysis of weather conditions over 12 years shows that precipitation during the growing season of Festulolium in the second year of vegetation closely correlates with seed yield (r = 0.85). The relationship between the yield and the amount of precipitation over the growing season is expressed by the regression equation: Y = 190.52 + 3.2894x1. The yield was closely correlated with the HTC (r = 0.80). This relationship can be expressed by the following equation: Y = 189.91 + 562.8x2. It is found that the optimal conditions for Festulolium seed yield formation arise when at least 147 mm of precipitation falls within the growing season (mostly during the period from aftergrowth to flowering), the hydrothermal coefficient is 0.8-1.7, the average daily temperature is within 17-19°C in the flowering phase and 18-21°C during the period of seed formation-ripening, and the proportion of days without precipitation in the flowering phase is at least 57%.
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