УСТОЙЧИВОСТЬ РАСТЕНИЙ СЕМЕЙСТВА КИПАРИСОВЫЕ (CUPRESACEAE) К АБИОТИЧЕСКИМ И БИОТИЧЕСКИМ ФАКТОРАМ СРЕДЫ В УСЛОВИЯХ ЦЕНТРАЛЬНО-ЧЕРНОЗЕМНОГО РЕГИОНА РОССИИ

Abstract

Coniferous by the number of species, forms and varieties make up 25 % of the genetic collection of arboretum of the All-Russian Research Institute of Fruit Crops Breeding. They are represented by three families, one of which is Cupresaceae. The purpose of the research is to identify highly ornamental types and forms of the Cupresaceae family of the gene pool of the arboretum of All-Russian Research Institute of Fruit Crops Breeding, which are resistant to a complex of adverse environmental factors. All studied species and forms well tolerate unfavorable conditions of the winter period of Central Russia. An evaluation of the general state at the end of the vegetation period showed that only Thuja occidentalis f. aurea-spicata had a weak vitality. Plants are noticeably weakened, the growth of shoots is insignificant, and the fruits are rare. The Juniperus pseudosabina and the Thuja occidentalis f. aurea-spicata were affected by diseases with the loss of decorativeness. Under the conditions of the arboretum, damages from pests with a loss of decorativeness were not marked. As a result of research, five highly ornamental genotypes resistant to a complex of unfavorable factors of the environment have been revealed for use in the greenbelt setting of the settlements in the Central Chernozem region of Russia. There are Chamaecyparis pisifera, Chamaecyparis pisifera f. filifera, Juniperus sabina f. tamariscifolia, forms of Thuja occidentalis — f. Ellwangeriana gold and f. lutescens.