Scientific Journal of KubSAU

The results of introduction test of species and cultivars variety of irises in the Central Yakutia are described in this article. Climatic conditions of the introduction region are extreme and they are strong restrictive factor at introduction to the culture of many other species and cultivar of decorative plants. The condition of plants after rewintering was estimated on a 4-mark scale. Total number of the plants which were lost in the first winter (0 points) is 126 species and cultivars that is 60,9%. For 01.06.2015 year a collection of irises in Yakutia makes 40 exemplar of species (22 species) and 31 exemplar of cultivars (30 cultivars), 7 species of them are successfully adapted (3 points) (Iris biglumis Vahl., I. bloudowii Ledeb., I. potaninii Maxim., I. scariosa Willd., I. setosa Pallas ex Link., I. tigridia Bunge, Pardanthopsis dichotoma (Pallas) Lenz). The listed species annually plentifully blossom, form seeds and intensive form escapes. Four species Iris biglumis, I. scariosa, I. bloudowii, Pardanthopsis dichotoma are form stable self-seedling

The article describes the environmental conditions and plant communities with Iris laevigata for the selection of optimal locations of its growth. The structure of natural populations can be a model for the creation of artificial populations of these species

The analysis of territorial protection of the vegetation of natural zones, separate geobotanical allotments (formations), unique vegetative associations and Red Data Book species of vascular plants of Yakutia is given in the article. The objects of vegetation kingdom that need urgent actions for their habitats’ protection are marked