EFFECTS OF HYDROCARBON ROCKET FUEL CONCENTRATIONS ON THE GROWTH AND MORPHOPHYSIOLOGICAL PARAMETERS OF RADISH UNDER VEGETATION EXPERIMENT CONDITIONS

The scientific study is devoted to the assessment of phytotoxic effects of petroleum products, in particular hydrocarbon rocket fuel (HCF), on plants. Under laboratory conditions, radish (Raphanus sativus L. var. sativus) was used as a test subject. The reason for the work was the necessity of ecological assessment of soils contaminated in the areas where rocket carrier parts fall.
The main task was to determine the relationship between the degree of soil contamination by HCM and changes in morphophysiological parameters in the indicator plant. Five soil variants were used in the study: three experimental ones with HCV content in concentrations of 100, 500 and 1000 mg/kg, as well as two control samples – a standard artificial soil reference (ASR) and soil from a real contaminated area (CA). Biotesting was carried out for six weeks. During the experiment, germination, stem and root lengths of seedlings were recorded and toxicity indices were calculated.
The results demonstrated the depressing effect of UHG on plant development and seed germination. At minimum concentrations of 100 mg/kg, only a slight reduction in shoot and root length was observed. However, when the concentration was increased to 500 and 1000 mg/kg, the negative effect became more pronounced: seed germination decreased to 40% and 25%, respectively, and the length of stems and roots decreased 2-4 times compared to control samples.
The observed changes clearly indicate the dose-dependent nature of UHG toxicity. The obtained data are of practical value for the development of pollution assessment standards, environmental monitoring and planning of measures for the restoration of the affected territories.

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