Introduction of some bulbous and bulbotuberous perennials in the conditions of the forest-steppe zone of the south of Western Siberia

Abstract

The biological characteristics of early fl owering, less distributed bulbous and bulbotuberous perennials with the purpose of their practical use in landscaping of the region have been studied. The results of introduction of bulbotuberous Bulbocodium vernum and bulbous: Iridodictyum reticulatum ‘J. S. Dijt’, Jahlumonian kandyk (Еrythronium tuolumnense ‘Pagoda’), bended kandyk (Erythronium revolutum), the Afl atun onion (Allium аfl atunense) and its varieties ‘Purple Sensation’, giganteum onion (A. giganteum), karatavioan onion (A. karataviense), tulipanoceous onion (A. tulipifolium) in the conditions of the forest-steppe zone in the south of Western Siberia are presented. All species refer to spring-fl owering ornamental perennials, fi nish vegetation after fl owering or fruiting. Data are given for 2010-2016. The climate of region of introduction is characterized by severe winter period, short, but hot, often drought summer with high solar insolation. The soil of experimental plot is dark-grey woodland with low structure. Irrigation is irregular. Observation methods are usual. Providing of layers in fl ower beds in time and space can be achieved by using to the species and varieties of kandyk, bulbocodium, iridodictium - blossom in the fi rst and third decades of May, and onions bloom in the third decade of May-June. The fl owering period ranges from 7 days for Erythronium revolutum to 16 for Allium аfl atunense variety, an average of 14 days. The highest layer of peduncle have been formed by Allium giganteum and A. аfl atunense, the middle layer by A. tulipifolium, the lower one by the rest of the species. The studied species and varieties are annually bloomed, showing resistance in the conditions of introduction. They were undemanding to the fertility and mechanical composition of the soil, agricultural techniques. All species are suitable for enriching the cultural fl ora of the region.