Marynych I. Biological peculiarities of North-American conifers in connection with their culture in the partiallly-wooded steppe of Ukraine

Object is North American conifers of partially-wooded steppe of Ukraine. The aim is the determination of bioecological particularities, form diversity of introduction's North American conifers, specialities of their propagation in conditions of culture. The choice of optimal assortment of conifers and working out of means of their landscape using. The route floristic method of researches and moden methods were used.Dendroflora of North American conifers was reasearched in the base of new scientific data of their growth and development and also means of propagations and introducing into the culture. The most perspective species and decorative forms of North-American conifers were determined. Principles and means of construction of de corative plantations with North American conifers were presented. Recomendations for their testing, using and constructions in garden-parc building , greenery and forestry were managed. Sphere of using is parcbilding, greenery and foretry.