Исследование химического состава репы, обработанной селенитом натрия, методом атомно-абсорбционной спектроскопии

Abstract

The paper presents data on the study of the chemical composition of Petrovskaya turnip variety when using non-root treatment of vegetating plants with a selenium-containing solution. Treatment of plants was carried out with a solution of sodium selenite with a concentration of 0.0005 and 0.001% by Se. The experiment was carried out according to the following scheme: 1) NPK (background) – control variant; 2) NPK + NRT Se 0.0005%; 3) NPK + NRT Se 0.001%. As a background macro fertiliser, nitroammophosca was added to the soil at the rate of 30 g/m2. In the background options the treatment of plants was carried out with distilled water. The content of selenium in turnip roots was determined by atomic absorption spectroscopy. It is shown that when treated with a solution of sodium selenite, the selenium content in the product part of plants in the variant of NPK + Se 0.0005% increased by 1.5 times, and in the variant of NPK + Se 0.001% – by 1.8 times compared to the control variant. It was found that non-root treatment of vegetating plants with selenium-containing solution led to a decrease in the content of dry matter in turnip roots by 1.5-1.6%, and the content of dry soluble substances remained at the level of the control variant. At the concentration of selenium in the 0.0005% solution, the content of ascorbic acid in root crops decreased by 7%, and the content of nitrates increased by 10.1% relative to the control variant. An increase in the concentration of selenium in the 0.001% solution led to a decrease in the content of ascorbic acid in root crops by 15.9% and an increase in the content of nitrates in them by 20.6% compared to the control variant.