Shpak N. Forestry and ecological features of distribution and renewal of wild service tree (Sorbus torminalis (L.) Crantz) in the plantings of the South Podilsk Forest-Steppe of Ukraine

In the dissertation the retrospective analysis and complex research of natural oak-hornbeam plantings is carried out, theoretical generalizations and the analysis of experimental data concerning distribution and natural renewal of a wild service tree (Sorbus torminalis (L.) Crantz) in the territory of the South Podilsk Forest-Steppe of Ukraine are given. The analysis of phylogenetic connections within the genus of rowan tree (Sorbus L.) was performed. The biomorphological characteristic, the natural range and geographical distribution of the species of Sorbus torminalis. A morphological description of the species has been made, a scale of decorative features has been developed, which makes berek medicinal promising for wide use in garden and park construction. The periodicity and abundance of fruiting, sizes and weight of fruits are determined, the peculiarities of seed germination, seed germination after 1–310 vegetation periods are investigated. Priority areas of plantings for seed harvesting have been identified. The conducted research allowed to develop scientific and practical recommendations for conservation, restoration of Sorbus torminalis in oakery of Podillia and formation of high-yielding forest plantings with its participation, to use the method of in vitro propagation for industrial production of planting material.