Abstract
Introduction. There is still an urgent need in viticulture for studying the effect of tank mixtures of pesticides and bioactive substances on Vitis vinifera and, therefore, the quality and composition of wine. We aimed to study the effect of NanoKremny (silicon fertilizer) treatment of the grapevine on the productivity and quality of grape harvest, as well as the quality of dry wines.
 Study objects and methods. Grape varieties from three vineyards in Crimea and the wines produced from them. We applied standard methods used in viticulture, plant protection, and oenological practice. Organic acids and volatile components in grapes and wines were determined by high-performance liquid chromatography and gas chromatography.
 Results and discussion. We found that the most effective use of NanoKremny was threefold at 0.15 L/ha during the periods of active growth and formation of vegetative and generative organs in grapevines. It had a positive effect on vegetative development, water balance, productivity of grape plants, as well as yield quality and quantity. Also, NanoKremny decreased the development of mildew and oidium diseases, preserved the content of titratable acids in grapes during their ripening, as well as accumulated phenolic compounds, tartaric and malic acids in grape berries.
 Conclusion. We found no negative effect of NanoKremny treatment of the grapevine on the physicochemical parameters and sensory characteristics of wines. Thus, this preparation can be used as a bioorganic additive in viticulture.
Highlights
There is still an urgent need in viticulture for studying the effect of tank mixtures of pesticides and bioactive substances on Vitis vinifera and, the quality and composition of wine
Our study showed that the optimal treatment of grapevines is a threefold application of NanoKremny (0.15 L/ha) during the periods of active growth and formation of vegetative and generative organs in the grape plant
This scheme has a positive effect on vegetative development, water balance, grape plant productivity, as well as yield quality and quantity
Summary
There is still an urgent need in viticulture for studying the effect of tank mixtures of pesticides and bioactive substances on Vitis vinifera and, the quality and composition of wine. We aimed to study the effect of NanoKremny (silicon fertilizer) treatment of the grapevine on the productivity and quality of grape harvest, as well as the quality of dry wines. We found that the most effective use of NanoKremny was threefold at 0.15 L/ha during the periods of active growth and formation of vegetative and generative organs in grapevines It had a positive effect on vegetative development, water balance, productivity of grape plants, as well as yield quality and quantity. We found no negative effect of NanoKremny treatment of the grapevine on the physicochemical parameters and sensory characteristics of wines. This preparation can be used as a bioorganic additive in viticulture. It reduces the toxicity of excessive heavy metals, neutralizes the negative effects of excessive nitrogen fertilizers, increases the population of ammonifiers, improves nitrification, and helps the soil to absorb mobile forms of nitrogen [10,11,12,13,14]
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