| Popis: |
For regions with a harsh climate, such as the Southern Cis-Baikal region, the remontant raspberries potential expansion is of undoubted interest: to use it not only in an annual mowed crop, but also to find out how realistic it is to get a crop from two-year-old shoots of remontant raspberries. For this, the winter hardiness of floricans of remontant raspberry cultivars was characterized. The article analyzes the results of long-term studies of winter hardiness and frost hardiness of remontant raspberries. A correlation between weather conditions and winter hardiness of plants was noted. The resistance to early frosts that occurs in the region in October - early November has been determined, the resistance to critical temperatures that are possible in winter and return frosts in spring has been analyzed. According to the results of the research, the most frost-resistant varieties of remontant raspberry were identified: Brilliantovaya, Rubinovoye ozherel'ye and forms 1-220-1 and 32-151-1, which are recommended as parental forms for use in breeding to increase the level of winter hardiness. The critical negative temperature for all studied varieties and forms of remontant raspberries was determined. When cultivating remontant raspberries in a two-year culture, the Rubinovoye ozherel'ye was rated as winter-hardy, the 32-151-1 form was moderately winter-hardy, and the other varieties were weakly winter-hardy. The remontant raspberry on two-year-old shoots began to ripen earlier than the raspberry of the traditional type of fruiting. Often the difference in ripening time was a week or more. A variety is noted, on which it is possible to obtain a crop on floricans. |
