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2018, N 3 (33) |
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ECOLOGY
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Andreeva I., Koshkin E., Belopukhov S. |
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Ecological assessment of oilseeds quality from spring rape varieties (Brassica napus L.) in conditions of model Sod-Podzoluvisol contamination by zinc and nickel |
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Some indicators of oil quality from low- (Oredezh) and high-erucic (Petranova) varieties of spring rape are investigated in case of their cultivation on Sod-Podzoluvisol contaminated by zinc and nickel. It is shown that when zinc has been applied at a dose of 800 mg/kg of soil, the oil content of both varieties decreased by 8-9%, and the concentration of zinc in the oil increased by 5.5-9.7 times compared to the control option and depending on the variety. Increasing the dose of nickel to 40 and 60 mg/kg of soil was accompanied by significant changes in the oil content and ratio of its essential fatty acids, improving its quality in high-erucic variety. On the contrary, the content of erucic acid in the oil of Oredezh variety in the experiment version with a dose of nickel 60 mg/kg of soil exceeded the normative value – 5% of the amount of fatty acids according to GOST R 53457-2009, which makes it unsuitable for food and technical purposes. In general, the variety Oredezh demonstrated greater stability of the fatty acid composition of the oil in conditions of soil contaminated with zinc and nickel, while the variety Petranova showed greater plasticity in composition and ratio of both saturated and polyunsaturated fatty acids.
Keywords: SPRING RAPE, OIL SEEDS, FATTY-ACID COMPOSITION, OIL CONTENT, POLYUNSATURATED FATTY ACIDS, ERUCIC ACID, CONTAMINATION, SOD-PODZOLUVISOL, ZINC, NICKEL |