Suitability of primocane-fruiting raspberry varieties for cultivation in the extended cycle in the Southern Cisbaikalia growing conditions

Abstract

When studying the world and domestic experience of cultivating primocane -fruiting raspberry varieties, the greenhouse crop cultivation method has attracted attention. Cisbaikalia is a territory where the cultivation period for horticultural crops is not long, whereas the need for fresh berries is high. Taking that into consideration, we see the prospect of developing a technology for cultivating primocane-fruiting raspberry varieties in the extended cycle in the Southern Cisbaikalia growing conditions. The present paper introduces the research carried out in 2019-2021 at the experimental site Phytotron of Siberian Institute of Plant Physiology and Biochemistry of the Siberian Branch of the Russian Academy of Sciences (Irkutsk, Russia). The research objects were varieties and selected forms of domestic primocane-fruiting raspberry. For this purpose, the plant productivity was determined, and phenological observations were performed. The research was carried out according to the generally accepted program and methodology for the variety study of fruit, berry and nut crops. The research involved medium and late-ripening varieties with a long fruiting period, such as Oranzhevoye chudo, Zhar ptitsa, Gerakl, Bryanskoye divo, Rubinovoye ozherel’ye, selected form 37-15-4. Plants of the first year of growth, which were in the budding phase at the time of transplantation, were selected. The plant preparing for transplantation was started 4 weeks before. In the first week of September, seedlings were transplanted into 8-10 liter containers. For normal growth and fruiting under new growing conditions, optimal water and temperature conditions were created, the plant feeding was improved. All the plants adapted well to the extended cultivation and entered the fruiting phase. High productivity was observed in Gerakl, Oranzhevoye chudo, and Rubinovoye ozherel’ye.