Analysis Of Ex Situ Cultivation Of Ukrainian Rare Steppe Dendroflora
Abstract
Anastasia S. Vlasenko
Preliminary analysis of cultivation of rare dendroflora ex situ of the Ukrainian Steppe is done. The species-specific and geographical location of dendroflora was also considered. The majority of species are cultivated within protected areas, namely the botanical gardens and dendroparks of the Steppe zone of Ukraine. The most abundant and widespread species are Armeniaca vulgaris Mill., Juglans regia L., Juniperus virginiana L. and Thuja occidentalis L. The great number of species is presented in protected zones (artificial parks) of the Donetsk and Odessa administrative regions within the Ukrainian Steppe. The most abundant in protected areas is Armeniaca vulgaris that is ranked third by the frequency of occurrence in protected parks. The most abundant in parks is Thuja occidentalis, which is only registered in five localities in protected areas. This could be explained by fact that Armeniaca vulgaris is introduced to the culture and naturally distributed in Ukrainian Steppe, while Thuja occidentalis naturally does not exist in the Steppe, but is widely used in green construction. The majority of dendroflora species concentrated in botanical gardens (165 species), arboretums (105 species), which are designed to preserve, study, acclimatize and breed the rare and common species of local and world flora. High species diversity was registered for Donetsk (108 species) and Odessa (105 species) region, because in these territories there are botanical gardens with large collections of species of tree and shrub plants of Steppe Ukraine. We founded some 165 species, representing 94.8% from total number of dendroflora ex situ in collection of botanical gardens of Ukrainian Steppe. The second place by the number of protected rare species takes dendrological parks – we registered 105 (60.4%) species within these areas. The landscape parks contain an estimated 80 species (46.0%).
<