Kyrnychyshyn O. Bioecological features of Primula veris L. s.l. in Western Lisostep's biotopes

The thesis was devoted to the research of the influence of the certain forest-ecological factors on the structural population's features and the distribution of Primula veris L. s.l. in Western Lisostep's biotopes. The classification scheme of environmental factors and the influence of key climate (average air temperature, relative humidity), silvicultural (insolation and soil productivity) factors on the optimal development of populations Primula veris L. were carried out. It was proved the direct links of phenological phases (flowering, fruiting) of Primula veris L. in the specific biotopes to assess its valuable medicinal productivity. The mathematical equation was worked out to determine the mass of the overground plant bodies of Primula veris L. depending on their morphological parameters. It allowed determining the mass of plants by the average morphological characteristics of the leaves and the flowering shoots. The age and vitality structure, the density and abundance of research species in different forest biotopes were investigated for the Primula veris L.'s populations. It was estimated the agrochemical characteristics of the soil. The effective growth were characterize by the areas with acidic soil pH 5,0-6,0, and for flowering shoots - 6,2-7,0 pH.