Abstract
The studies of the factors of formation SO2-binding complex of white and red grape cultivars from different soil and climatic regions of the Crimea were carried out. The formation of the SO2-binding complex of grapes is associated with a combination of endogenous and exogenous factors. It was found that the most significant factors (α&0.05) in the formation of SO2-binding complex are the cultivar, soil-climatic region of growth, harvest year, and concentration of sugar. Revealed that in the case of white grape cultivars – the cultivar (α = 0.0002) and the soil-climatic region of growth (α = 0.0003) had a significant effect on the accumulation of aldehydes. In red grape cultivars the accumulation of SO2-binding components (ketoacids and aldehydes) was determined by the grape cultivar (α&0.045); α-ketoglutaric acid – soil-climatic region of growth (α = 0.014). The relationship between the mass concentrations of aldehydes and sugars in red grape cultivars has been established.
Highlights
The number of organic vineyards around the world has significantly increased
As for aldehydes, their lowest content was noted in the Syrah, Sangiovese and Ekim kara grape cultivars
Among the studied white grape cultivars, the lowest concentration of aldehydes was found in the Sary Pandas, Kokur belyi and Sauvignon vert cultivars
Summary
The number of organic vineyards around the world has significantly increased. Federal Law No 280 (about organic products and amendments to certain legislative acts of the Russian Federation), which entered into force on January 1, 2020 in Russia opened the field of activity for the Russian production of organic products with the same basic principles as in the rest of the world which includes care for the environment, soil, ecosystems, human health, preservation of biodiversity and refusal to use agrochemicals [1]. Among these substances, the most stable compounds with SO2 form ketoacids and acetaldehyde [3]
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