Keywords
Abstract
This article presents the results of studies, carried out in 2020–2022 in the soil and climatic conditions of
viticultural and winemaking region of the South Coast of Crimea, on the effectiveness of foliar fertilizing of valuable wine grape variety ‘Cabernet Sauvignon’ with chelate micro-fertilizers. Foliar dressing with the studied fertilizers was carried out in the following phenological growth stages of grape plant development (BBCH scale): “inflorescences clearly visible”, “inflorescences fully developed”, “full flowering”, “berries pea-sized” and “beginning of ripening”. As the experiment result, positive effect of these micro-fertilizers on the phytometric indicators of grapes, as well as quantitative and qualitative yield indicators was determined. It was experimentally established that foliar dressing with chelate micro-fertilizers contributed to obtaining a good conditional grape yield in both the experiment and reference standard, while in the experimental variant there was an increase in the yield by an average of 7.4%, and in the cropping capacity - 5.9% (3.3 c/ha). In the experiment, using the studied system of mineral nutrition, an improvement in the chemical composition of grape berries was noted: sugar content increased by 6.3% (1.3 g/100 cm3), and acidity decreased by 3.6% (0.3 g/dm3), in comparison with production reference standard.