Winter hardiness, drought resistance and assessment of decorativeness of Corylus avellana L. in the conditions of Bryansk

The winter hardiness of common hazel was assessed in late March – early April, when a more stable temperature regime was observed, and after the end and return of late spring frosts. Another important indicator in assessing the prospects of using plants in landscape architecture is the drought resistance indicator. The effect of drought affects the water metabolism of plants. A large loss of water due to intensive transpiration causes the development of water deficiency in the plant, which can lead to death. In the conditions of Bryansk, all the studied hazel plants and its form 'Purpurea' have high winter hardiness and good drought resistance, which means that they are promising for their use in landscape architecture. However, in individual specimens of the species hazel growing in open areas, burning of their edges may be observed on the leaves during the dry period. A monthly assessment of the decorative value of common hazel and hazel 'Purpurea' was carried out according to the method of O.Y. Yemelyanova «Scale of gradations of signs for a comprehensive assessment of the decorative value of woody plants during the year». The sum of the points for the year shows the degree of decorative effect of the plant in the design of the urban and park environment. Both species are assigned to highly decorative shrubs.

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