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2021, № 1 (43) |
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BIOLOGICAL RESOURCES
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Anteh J.D., Mostyakova A.A., Kalimullin M.I., Timofeeva O.A. |
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Effect of mineral fertilizers on the variability of phytochemicals in kale |
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The effect of five mineral nutrients on the variability of the content of biochemical compounds, such as flavonoids, phenolic compounds, vitamin C, carotenoids and the antioxidant activity of kale (Brassica Oleracea var. sabellica) collected at the edible maturity stage. Manipulation of the phytochemical composition of the kale cabbage using mineral fertilizers was evident in the results achieved. The various mineral nutrients used had different effects on the content of the studied phytochemicals. The content of flavonoids and carotenoids did not decrease with any of the various mineral nutrients used. Contrary to recent research suggesting that rare earth elements are good stimulators of secondary metabolite accumulation, our results showed a decrease in the content of phenolic compounds in plants fertilized with neodymium. The total antioxidant activity increased under the influence of NPK and humate, which correlated with the highest content of soluble phenolic compounds and flavonoids in kale leaves. Low doses of N have a positive effect on these indicators. Mineral supplements of trace elements also had a stimulating effect on the accumulation of the studied substances. However, in addition to trace elements, a significant role is played by the presence of humic acids (in humate), which together with trace elements have the maximum stimulating effect on the content of the substances under study.
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