TAXONOMIC COMPOSITION, BIO-ECOLOGICAL PROPERTIES, ORNAMENTAL QUALITIES AND PROSPECTS OF ECONOMIC USE OF THE COLLECTION OF ANNUALS OF THE BOTANICAL GARDEN OF BILA TSERKVA NATIONAL AGRARIAN UNIVERSITY

Abstract

The article highlighted the results of the analysis of collection of annual flowering-and-ornamental plants in the Botanical Garden of Bila Tserkva National Agrarian University. It was found that the collection of annuals included 76 species and 267 varieties belonging to 61 genera and 27 families. The largest number of species was represented by the families Asteraceae – 25 and Amaranthaceae – 6 species. Callistephus chinensis (L.) Ness. species containing 171 varieties belonging to three classes, 10 types and 44 varietal types and Tagetes L. genus including three species and 42 varieties were distinguished by varietal diversity. The taxonomic composition of the collection of annual flowering-and-ornamental plants was analyzed and it was established that 53% belonged to beautiful flowering plants, 21% to leafy ornamental plants, 10% to fragrant plants, 7% to dried flowers, 5% to climbing plants, 4% to ground cover species. It was established that all species and varieties of the collection differed in origin, height of shoots, nature of branching. According to the methods of cultivation, 78,3% of the species and varieties of the collection were suitable for sowing in open ground, and only 21,7% required a seedling method of cultivation. Analysis of flowering dates showed that 22,5% of the species and varieties of the collection began flowering 8-9 weeks after sowing, 52,3% – after 10-12 weeks and 25,2% – after 13-14 weeks after sowing seeds. Ornamental qualities of annuals, in particular, growth forms and height of plants, color palette of flowers and inflorescences, terry forms of flowers, their aromatic properties, variety of shapes and sizes of leaves, long and abundant flowering and resistance to the conditions of urboecosystems allowed to widely introduce annual flower plants into urban landscaping, in particular, in geometric flower beds, mixed borders, rabatka, borders, solitaires, groups, Moorish lawns, parterre flower beds and to create monoculture gardens.