Uzbek I. Ecological biological assessment of technogenic landscapes edaphotopes in steppe zone in Ukraine (using the Nikopol manganese ore basin as an example).

This dissertation is devoted to the ecological-biological appraisal of disturbed landscapes as a basis of reclamation of disturbed lands. It is shown that the most appropriate initial amelioration of disturbed lands is growing perennial legumes. Most important for practical use in reclamation are the proposed mathematical models of the ecological-biological characteristics of the plant root systems and their progression through different depths of the soil monolith. Preliminary investigations found the characteristics of translocation within the investigated species, especially in the underground parts. This showed that the mass of roots focused around roots which were effective at concentrating the elements essential for plant growth. It was shown that the disturbed lands strongly stimulated the development of microorganisms. Agricultural plant communities provides the best improvement and stability of the quantity of microbial communities in accordance with the physical-chemical characteristics of th is disturbed land. The first intensive investigations involved the decomposition of plant roots of varying horizons of these landscapes. This research showed the level of enzyme activity in this disturbed soil, and its involvement in the steps of soil biogenesis. A strategy of biological reclamation is presented. The results of the research can be used by the mining and agricultural enterprises, and in teaching agronomy and biology.