Kolyada N.A.
Vestnik IrGSHA 2022; (111): 89-98
The study of the green spaces of Primorsky territory showed that 13 species of woody North American plants are found in 11 cities. Most of them are in good condition; sick and dried plants are removed in a timely manner. According to the degree of abundance, they are very common (4 points - Acer negundo L., Physocarpus opulifolia L., often (3 points) - Amorpha fruticosa L., Robinia pseudoacacia L., Hydrangea arborescens L. f. grandiflora and Parthenocissus inserta (A. Kern.) Fritsch, rarely (2 points) - Rhus typhina L, Thuja occidentalis L. and Picea pungens Engelm. f. glauca, very rarely (1 point, only in Ussuriysk) - Padus virginiana L., Ribes aureum Pursh, Fraxinus pennsylvanica Marsh and Populus deltoides Marsh. Plant height varies significantly, which is associated with growing conditions (geographical location of the settlement, age and winter hardiness of plants). Most of the studied plants have high winter hardiness (I-II points), Robinia pseudoacacia L.), and Amorpha fruticosa L. are less winter-hardy (III-IV points) and freeze in abnormally cold winters. Robinia pseudoacacia L. and Hydrangea arborescens L. f. grandiflora are exceptionally decorative during flowering; the decorative effect of other species varies from high to weak. In terms of seasonal decorativeness, coniferous plants are decorative throughout the year, deciduous - during the growing season. In recent years, some North American plants have shown a tendency to be invasive, they can spread outside the planting sites through seed and vegetative reproduction. The spread of these species in urban conditions is prevented by the cultivation of part of the area by mowing the grass on the household territories, the removal of vegetation from the roadside, while some of the seedlings are destroyed. An assessment of the ecological and biological characteristics of North American woody plants used in landscaping shows the prospects and expediency of their further use in landscape design in the south of the Far East.
