Sendonin S. Dynamics of natural seed regeneration of Common Oak stands (Quersus robur L.) in the "fresh oak" site condition of the South of Right-bank of Forest-and-steppe zone depending on the complex of abiotical factors.

The аt the dissertation natural and historical conditions of south part of Right-bank Forest-Steppe are considered. Distribution of forests by groups of tree species, forest sites types, forest site index class's and density of the main tree species is analyzed. Peculiarities of the main tree species in oak forests of the region are described. Advantages of natural seed regeneration in compare with planting coppice are described. The estimation of yearly amount of acorns is given. Influence of ecological parameters of the vegetative period on fructification of common oak is determined. Quantitative and quality indicators of fructification of common oak are shown. Quality of seeds of tree species common in oak forest is analyzed, including germination of seeds, occurrence and survivals of seedlings. The main parameters, concentrations and total stocks of nutrition's in forest litter and annual leaf fall underneath pre-mature, mature and over-mature oak forests canopy are determined. Influence of abundance of an herbal layer on adaptation and survival of seedlings underneath oak forests canopy and on clear cuts is determined. Light exposure and its impact on quantity and quality of natural seed regeneration underneath oak forests canopy is determined. Physical and chemical and agrochemical properties of forest grey soils and differences between mature oak forests and clear cuts areas are assessed. Also heath of advanced natural seed regeneration in oak forests canopy and in clear cuts is determined. The main parameters of forest litter and its influence on the germination of oak acorns under the canopy pre-mature and mature forests are studied. GIS based method for accounting of natural regeneration of dominant and co-dominant tree species is developed. Graphical illustrations and their description were developed accordingly to K.B. Losytskyi and V.G. Nesterov scales.