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FORMATION OF THE PERSPECTIVE ASSORTMENT OF CUPRESSOCYPARIS LEYLANDII J. AND THUJA L. IN THE CONDITIONS OF THE SOUTH OF RUSSIA
06.01.00 Agronomy
Description
The work presents results of the study of Cupressocyparis Leylandii J. and Thuja L. varieties in the conditions of the Kuban zone of horticulture of the Krasnodar region on the main adaptive features: winter hardiness, drought resistance, resistance to common diseases, and decorative features. The aim of the research was to identify the most adaptive and highly decorative varieties of Cupressocyparis and Thuja in the conditions of increasing abiotic and biotic stresses and to form an adaptive and promising assortment of coniferous plants for the conditions of the south Russia's gardening. The results of a complex assessment of 6 introduced varieties Cupressocyparis Leylandii J. and 12 varieties of Thuja L. are presented. The varietal features of adaptability and decorativeness was established in specific growth conditions, which made it possible to identify the most adaptive, combining resistance to temperature stresses (drought-resistant, winter-hardy), major diseases and pests in combination with high decorative indices (architectonics of the crown, color of needles, vitality, decorative period). These are Cupressocyparis Leylandii J. varieties: Leightons Green, Variegata, Gold Rider; and Thuja L. varieties: Degroots Spire, Mini Smaragd, Atrovirens, Dura, Brabant, Can-Can, which showed a high adaptation to the weather and climatic conditions of the southern region in combination with decorativeness, recommended for the extension of the assortment of coniferous plants and creation of garden landscapes in the conditions of the south of Russia