Sytnyk S. Bioproductivity, Ecological and Energy Potential of Robinia pseudoacacia L. Stands within the Riparian Steppe of Ukraine

The dissertation work is devoted to the study of theoretical and applied aspects of assessing the biotic productivity of stands with Robinia pseudoacacia L., the development of mathematical models for evaluating the qualitative indicators of the components of the trunk and crown phytomass in Black locust trees. The development for mathematical dependences of live biomass of structural fractions on the aboveground part of trees and stands on mensuration characteristics was carried out. Quantitative characteristics of ecosystem functions as carbon deposition oxygen production and energy consumption have been established. The accumulation of metal inorganic contaminants in the aboveground phytomass of Black locust stands in the conditions of polyelements soil contamination is estimated. The implementation of ecosystem functions by forests can be achieved in the conditions and through the implementation of forest management, which defines the ecological, economic and social functions of forests as equivalent. As a result, of the research, the prospects of using forest-forming species Black locust in reclamation stands in the conditions of polyelement soil contamination were supported. The obtained results allowed to estimate degree the concentration of metal inorganic contaminants into the phytomass of assimilation organs in the stands studied. The results of assessment of biotic productivity, annual production of structural components of the aboveground part of stands, quantitative indicators of ecosystem functions should serve to update data on forest resources, rationing of forest use, balanced management of forest ecosystems, monitoring of condition forests and the effectiveness of forest measures.