The area of Zhytomyr is 6083 hectares and the area in the urban system is 4229.8, which is about 69.5 % of the total area of the city. The system of urban green areas of Zhytomyr includes three groups of plantations: green areas for public use, restricted use, and special purpose. These plantations have not been inventoried for more than 35 years. Currently, almost all elements of the green zone of the city have indicators below the norm, especially in terms of beautification. Only 135.0 ha, 40.3 % of public use green areas, have a proper level of beautification. The authors recommend to include in the city master plan the inclusion of coastal stripes, partially water protection zones of all rivers in the structure of separate objects of landscape architecture, mainly landscape parks, improve the location of such facilities throughout the city because most of the residential areas in the center of the city do not have enough recreational areas (parks, squares). Zhytomyr is located in the Polissya climatic zone, the area under forest is 29 %. For the existing population of 270.9 thousand people, 44.7 thousand hectares of green area forests are needed, of which the municipal forests will be 5.4 thousand hectares. The territory of most industrial enterprises has 20 % of green areas, institutions and organizations of defense have 40 %. Of the requirements for urban green areas, the highest priority should be given to the regulatory level of landscaping both within urban areas and beyond. The level of the green area of the territory of most schools, kindergartens, public institutions, hospitals meets the normative indicators. There are 62.0 hectares of forest plantation within the railroad drainage area, about 2.0 hectares of open land with herbaceous vegetation. The authors noted that plantations along the railway are of great importance for the formation and contemplation of landscapes, so plantations and dendrological composition should take into account these circumstances. The composition of herbaceous vegetation should be regulated by the necessary care, the harmful weed species, especially the quarantine species, should not be allowed to reproduce. At present, there are no sanitary protection zones of enterprises, about 15 % of the area of 1-2-storey buildings are located in the contamination zones of harmful emissions of enterprises, which must be taken into account when creating green spaces, constructions of these plantations and selection of the necessary range of trees, shrubs, lawns.
The results of studies of bacterioses Fraxinus excelsior, Betula pendula, Aesculus hippocastanum, Quercus robur, Pinus sylvestris, Populus alba, Populus tremula, Morus alba, Ailanthus altíssimaare presented. The focus is on that, phytopathogenic bacteria are extremely harmful and directly involved in the epiphytotic dieback of woody plants. To study the symptoms and etiology of bacterial diseases of woody plants in the green zone of the city of Kiev, special methods of forest pathological examinations and phytopathological studies were used, as well as methods generally accepted in experimental microbiology, in particular the selection of affected organs and tissues, isolation of micro-and microorganisms into a pure culture; checking the pathogenic properties of isolated isolates and their identification and the like. It is shown that pathogens of bacterioses of the studied plants are phytopathogenic bacteria-polybiotroph from genus Pseudomonas, Xanthomonas, Enterobacter, Erwinia, Brenneria, Xylella, Rhizobium, Corynebacterium, Bacillus, Clostridiumetc. Symptoms and features of the pathogenesis of ash tuberculosis are given (causative agent-Pseudomonas syringae pv. savastanoi); bacterial dropsy of white birch (causative agent-Lelliottia nimipressuralis), common horse chestnut (causative agent-Pseudomonas syringae var. aesculi), common oak (causative agent-Lelliottia nimipressuralis), white poplar and aspen (bacterial association, in particular Erwinia cancerogena, Corynebacterium humiferum, Bacillus populi), white mulberry (causative agent-Pseudomonas syringae pv. mori), ailanthus, (pathogen not identified); and tumorassociated bacteriosis in pine (causative agent is not identified). The need to deepen studies of pathogenic components of automicrobiota, in particular in the context of understanding both the general biological problems of pathology and the goal of developing forest protection measures, is noted.
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