Çakıldak Fındık Çeşidinin Corylus colurna L. Çöğür Anacı Üzerinde İlkbahar ve Yaz Döneminde Aşıyla Çoğaltılması

Objective: The objective of this study was to determine the grafting success of hazelnut on Corylus colurna L. seedling rootstock in the spring and summer periods in Ünye, Ordu. Materials and Methods: The rootstock material was 2-3 years old Corylus colurna L. seedlings. The scion was Çakıldak (Corylus avellana L.) cultivar. For three years (2020-2022) in the spring, whip grafting on five different dates (4 April, 11 April, 18 April, 25 April and 2 May) and patch budding on three different dates (2 May, 9 May and 16 May) were applied under unheated high plastic tunnel conditions. Daily fresh scions and stored scions (SS) at 4°C were used for whip grafting. For two years (2020 and 2021), Corylus colurna L. seedlings were grafted with patch budding technique on 3 different dates (August 6, August 13 and August 20) under open field conditions. Graftings and buddings were made directly on the tubed seedlings. Results: The success and shoot development in whip grafting and patch budding in the spring were significantly affected by grafting dates over three years. Whip graftings gave the most successful results using SS on April 4 (93.3%) and April 11 (86.6-93.3%) in 2020 and 2022. They developed shoots between 171.8 cm and 212.2 cm depending on year, grafting date and scion type. Patch buddings in the spring gave in the most successful results on 16 May 2020 (93.3%) and 16 May 2022 (83.3%). They developed shoots between 150 cm and 218, depending on year and grafting date. Patch buddings in summer resulted in the highest success on 20 August 2020 (93.6%) and 20 August 2021 (80%). Their shoot developments were between 206 cm and 228, depending on year and grafting date. Conclusion: As a result, successful results were obtained from grafting trials of Çakıldak hazelnut cultivar on Corylus colurna L. rootstock in the spring and summer periods under Ünye ecological conditions. It has been evaluated that the data will contribute to the establishment of the hazelnut nursery sector and will shed light on future research.