Abstract
The article presents information on the influence of metal ions on the shoots of the Chinese tea plant - Thea sinensis L., cultivated in experimental and field conditions of the Lankaran Regional Scientific Center. The research was carried out in 2022-2023 on river sections located in the village of Khanbulan of Lankaran region, and the village of Khychu, Lerik region, which represent a subtropical zone with high humidity. Soil samples were taken and its water capacity and water-holding capacity, mechanical and organic components, as well as ions of certain metals were determined. The tea plant is very sensitive to environmental factors. Demanding on soil acidity, relative humidity, light and heat. Therefore, in our studies, to ensure the dynamic development of the tea plant, ash-yellow and ash-clay-yellow soil samples were taken. Thus, since the common soil types in this region are ash-clay-yellow and provide the presence of metal ions in the lump, this affects both the quality of the tea leaf and the antioxidant nature of the bioactive compounds of the extractive substance, as well as the color shades of tea. It is in this regard that the tea plant differs significantly from other drinks in its active influence on people’s well-being and health. For this, flavonoids are used in tea leaves - theine, catechin + theine complex, flavanol, caffeine, etc. Quantitative indicators are defined as a quantitative change in the extractive substance depending on metal-ions [1, 2, 3]. It is clear from the research that a certain metal ion is dominant for tea plants according to the nature of soil types. For the tea plant, FeO, Fe2O3, Ał2O3, MnO (iron and aluminum ions) are of special importance and are indispensable nutrients.
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