IMPLEMENTATION OF MODERN TECHNOLOGIES TO ALLEVIATE
Keywords:urban ecosystems, perennial plantings, soil sickness, silicon-containing minerals, salicylic acid, microbiocenosis, and adaptive potential
Introduction. Urban perennial plantations are exposed to numerous anthropogenic pollutants, recreational load, etc. As a result, the physical and chemical properties of the soil deteriorate, the development of useful soil microflora is inhibited, the phytosanitary properties of soil ecosystems worsen, the intensity of mineralization processes and availability of macro- and micronutrients for plants drops down, and the concentration of toxic substances increases, which leads to soil sickness.
Problem Statement. Today, in Ukraine, the causes and features of soil sickness manifestation in urban ecosystems have been virtually unexplored, and there has been no environmentally sound approach to overcoming negative consequences of this phenomenon.
Purpose. To implement environmentally sound technology for overcoming soil sickness in urban green areas through the integrated use of the natural silicon containing mineral analcite and a synthetic analog of allelochemical (salicylic acid).
Materials and Methods. The experimental sites have been established in the most polluted and anthropogenically disturbed green areas of the Obolon District in Kyiv. The content of micro- and macro-elements, the main ecological-trophic groups of microorganisms have been evaluated, the directions of microbiological processes have been assessed with the use of mineralization and immobilization coefficients. Plant vitality has been determined by the degree of foliar injury, crown defoliation, photosynthetic pigment content, and activity of enzymatic antioxidants in leaves. Soil allelopathic activity has been determined by the bioassay technique.
Results. Physical, chemical, and biological processes related to soil-sickness in urban areas have been studied and approaches to control these processes have been determined. The innovative technology to alleviate soil sickness in urban green areas has been tested.
Conclusions. The advantage of the proposed technology is a complex synecological approach that which provides optimization of agrophysical, agrochemical, and biological characteristics of soil (optimal pH level, balanced content of mineral nutrients, elimination of toxicity), enhances the adaptive potential of cultivated plants to negative biotic and abiotic factors including phytopathogens.
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