Abstract
The article presents the results of studies, carried out in 2018-2020 in soil and climatic conditions of viticultural zone of the South Coast of Crimea on wine grape variety ‘Cabernet-Sauvignon’. It was established that double application of national chelated micronutrient fertilizers Tiaton and Chelaton Extra for foliar dressing of grapes contributed to an increase in the average bunch weight by 9.3-15.3 g (10.3-16.9%), shoot productivity by 10.4-17.1% and cropping power by 0.6-1 t/ha (10-16.7%) in comparison with the control. It was experimentally determined that test treatments with Chelaton Extra preparation led to a significant increase in the average length of annual shoots by 13.3 cm (9.3%) and a gain in the green matter of bushes by 265.9 cm3 (12%). Using of the studied micronutrient fertilizers against the background of increased grape productivity positively influenced the process of sugar accumulation and ensured the value component at the control level. The studies have proven that double treatment with Chelaton Extra fertilizer contributed to an increase in the mass concentration of phenolic substances in wine by 10.7%.
Highlights
The application of foliar top dressing during the active growing season of plants is an important agricultural technique in the growing crops technologies, including grapes
Since nowadays the increasing the yield, quality of fruit and berry products and grapes is a relevant aspect of the "Doctrine of Food Security of the Russian Federation", according to which the level of food self-sufficiency should be 60-70% [9], the purpose of our work was to assess the impact of national chelated micronutrient fertilizers on the productivity of grape plantations and the quality of table red wine made from Cabernet Sauvignon
- a significant increase in the cropping capacity of technical grapes in the experimental variants was obtained - 0.6-1.0 t / ha (10-16.7%), due to a significant increase in the average mass of a bunch by 9.3-15.3 g, while the productivity of shoots exceeded the control by 10.417.1%;
Summary
The application of foliar top dressing during the active growing season of plants is an important agricultural technique in the growing crops technologies, including grapes. Along with high and stable grape yields, the task is to obtain high-quality raw materials for the production of competitive wines. It is commonly known that the quality of grapes is determined primarily by the acidity and sugar content of the juice of the berries. Having other optimal conditions being equal, to achieve the necessary conditions of the grapes, it is important to provide the grape plants with sufficient nutrition elements such as phosphorus, potassium, magnesium, boron, etc. Having other optimal conditions being equal, to achieve the necessary conditions of the grapes, it is important to provide the grape plants with sufficient nutrition elements such as phosphorus, potassium, magnesium, boron, etc. [7]
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