Assessment of the ecological and ameliorative condition of the soil and potential risks when using different types of irrigation of decorative plants

Purpose. Assessment of the ecological and reclamation state of the soil and the probable risks when using different types of irrigation: traditional sprinkling and subsurface drip irrigation. Methods. Field, laboratory analytical, Hakanson's method Results. Diagnostic soil indicators characterizing soil degradation processes and the degree of their development were analyzed in the experimental plots of lawn and thuja, using sprinkling and subsurface drip irrigation. Regarding the state of the soil, it was determined: Both types of irrigation (drip and rain) have a positive effect on soil density; organic matter in the soil decomposes faster than it is formed; the fastest degradation of organic matter is observed under the lawn with drip irrigation, which indicates a lack of nitrogen available to plants; nitrogen is the main limiting factor for plant growth with both types of irrigation. It is also determined that it is necessary to regularly apply nitrogen fertilizers to the lawn, especially at the beginning of the growing season; small doses of nitrogen fertilizers in the spring are sufficient for thuja; complex microfertilizers of prolonged action are required to eliminate copper and zinc deficiencies. It is also necessary to monitor the quality of irrigation water to avoid soil contamination. The level of soil contamination with heavy metals is low. Conclusions. Both types of irrigation have both positive and negative sides. To obtain optimal results, it is necessary to regularly conduct soil analysis and apply the necessary fertilizers. Particular attention should be paid to the quality of irrigation water. There is a small risk of increasing environmental risk over time.