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The regularities of dependence of conditions of growth, development and formation of productivity of a miscanthus giant and increase of productivity at the expense of influence of agrotechnical factors are established in the work: terms of planting and depth of wrapping in the conditions of the western forest-steppe in Podillya. The results of the research are obtained on the peculiarities of the formation of biometric indicators of giant miscanthus depending on the application of a set of technology elements - planting dates, depth of rhizome wrapping. It was found that the increase in land mass of plants in the formation of yield 55.7 t·ha-1 was obtained by planting in the first period (I-II decade of April) to a depth of rhizome wrapping 9 cm. Intensity of land mass increase affected the yield of solid biofuels. During the first planting period with a rhizome wrapping depth of 9 cm, the maximum calculated energy yield of 206.09 GJ·ha-1 was obtained. It is established that the highest yield of bioenergy productivity of perennial miscanthus of the giant variety Autumn Starflower was obtained taking into account soil and climatic factors in the first planting period at rhizome depths of 9 cm, which allows efficient use of soil moisture and temperature during planting.

The relevance of the study is conditioned by the solution of environmental issues to preserve the natural biological diversity of plant life forms in Central Asia and the Balkan Peninsula. The most important task of Uzbek botanists is to investigate all aspects of the structural and dynamic organisation of vegetation cover and changes in plant communities in areas affected by the intense impact of anthropogenic factors. In this regard, the purpose of this study is to conduct a comparative characterisation of plant life forms of natural and anthropogenic landscapes of Central Asia and the Balkan Peninsula. The leading approach to the examination of this problem is spatial-comparative, which allows comprehensively investigating the elements of the system of plant life forms of natural and anthropogenic landscapes. In addition, during the empirical study, the collected field material was analysed by generally accepted geobotanical and forestry methods, which consist in describing the topographic position of woody, semi-woody, polycarpic, and monocarpic terrestrial grasses, aquatic plants. The authors used both herbarium and live material from expedition surveys on the Biosphere Reserve and the protected area of the Uvac river gorge by Kazakh, Uzbek, Greek, and Turkish researchers. As a result, a comparative characteristic of the state of modern plant communities of Central Asia and the Balkan Peninsula by the nature and degree of anthropogenic impact was presented. The main life forms of plants of the regions under study were covered; the interrelation of environmental conditions with the process of flora formation was identified and substantiated. The materials of the study are of practical value for ecologists, landscape researchers, geographers, and biologists to use the findings in creating long-term plans for the development of natural landscapes for nature reserves, ecological centres, and nature protection zones. The developed method of comparative characteristics can be used to investigate natural and anthropogenic landscapes of other territories

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Miscanthus giant is one of the perspective crops for the soil and climatic zone of Ukraine, which is grown as raw material for processing into solid biofuels. However, for industrial use there is no cultivation technology adapted to the conditions of Ukraine. One of the promising directions is to study the conditions of giant miscanthus productivity increasing on the basis of determining the features of plant growth and development, improving the elements of cultivation technology in the conditions of the Western Forest Steppe. As a result of the observations and calculations, the peculiarities of plant growth and development in the first and subsequent years of vegetation and the formation of the above ground mass (biomass) of giant miscanthus were analyzed, depending on the soil and climatic conditions of cultivation. The regularities of growth conditions dependens, development and formation of miscanthus productivity due to influence of agrotechnical factors of planting density and mass of rhizomes are established in the study. Biometric indices of giant miscanthus plants in sprout height for October make a maximum value of 159 cm for planting density of 15 thousand plants / ha with mass of rhizomes 41-70 g. The maximum value of the biomass yield indicator was noted for planting density study of 15,000 units / ha with rhizomes of 41-70 g, which averaged 18.5 tons / ha during the years of analysis. Based on the results of the research, for providing a high productivity of miscanthus giant plants as raw material for Western Forest-Steppe biofuel production, the planting density of 15 thousand plants / ha with rhizomes 41-70 g is recommended. Improved technology for the cultivation of giant miscanthus for biofuel production is proposed