Assessment on winter hardiness of varieties of fruit and berry cultures in the conditions of the Hangalassky ulus of Sakha (Yakutia) Republic

Abstract

The article presents the materials of testing to assess the winter-hardiness of seedlings of fruit and berry crops in the agro-climatic conditions of permafrost soils of the Khangalassky district of RS (Y). The purpose of the research is to evaluate for winter hardiness new varieties of fruit and berry crops in the conditions of permafrost soils on the floodplain terrace of average weaving of the Lena River. Research started in the fall of 2016. According to the results of research, winter-hardy cultures and varieties were determined. In overwintering the first year of research, the winter-hardiness was 18.2% of 55 seedlings. From overwintered crops and varieties of 18 seedlings, 10 or 55.5% were wintered. Thus, black currant saplings with winter hardiness of 100% for 4 years of life in 2 varieties Yadrenaya and Kalinovka are marked as the most winter-hardy. Biological treatment with foliar and foliar feeding contributes to the better formation of leaves and branches of the new order in these varieties, which affects the excellent winter hardiness of the black currant varieties Yadrenaya and Kalinovka. Research continues.