The Effect of Collection Time, IBA and Putrescine Treatments on the Rooting Potential of Foşa Hazelnut Cultivar

Objective: The aim of the research was to determine how collection time, IBA, and putrescine treatments affected the rooting potential of the Foşa hazelnut cultivar (Corylus avellana L.). Material and Methods: Cuttings were taken from 1-year-old root suckers of Foşa hazelnut cultivar on 4 different dates (June 15, July 10, August 4 and August 28; in 2021 year). 3 different treatments [Control, IBA (2000 ppm) and IBA+putrescine (2000 ppm+1600 ppm)] were performed to the prepared cuttings. Rooting, callusing, survived cutting ratio, dead cutting ratio, root number, root length, rooting level, number of cutting with buds, number of cutting with shoot, and number of cutting with leaves properties were investigated in cuttings removed from the rooting medium. Results: The collection time and treatments had a significant effect on the rooting ability of Foşa hazelnut cuttings. Depending on the collection time and treatments interaction, the callusing ranged from 1.7 (in IBA+putrescine treatment in the June 15) to 96.7% (in IBA treatment in the July 10). Rooting was determined between 0 (in control in the August 3, in control and IBA+putrescine treatments in the August 28) and 26.7% (in IBA treatment in the July 10). The root number was determined from 0 (in control in the August 3, in control and IBA+putrescine treatments in the August 28) to 13.1 (in IBA treatment in the July 10). Root length was measured between 0 (in control in the August 3, in control and IBA+putrescine treatments in the August 28) and 7.4 cm (in IBA treatment in the July 10). The best rooting scale was determined in (2.5) cuttings collected in July 10 and treated with IBA. It was followed by (2.3) cuttings treated IBA collected in June 15. Conclusion: It was determined that the rooting ability of IBA-treated semi-hardwood cuttings collected in the early period from Foşa hazelnut cultivar was higher.