Evaluation of Patch Budding Success in Persian Walnut Affected by Different Treatments after Budding

Abstract

Vegetative propagation of Persian walnut (Juglans regia L.) is more difficult than many other fruit trees. Temperature, relative humidity, water status of the scion and rootstock, nutrient uptake, time of grafting, physiological condition of the rootstock, and scion type all can affect grafting success. An experiment was conducted to evaluate the effects of post-budding irrigation frequency (3, 7 and 10-days), budding date (14 June, 5 and 26 July), and rootstock heading methods. All treatments and evaluations of their effects were performed in field conditions, for two consecutive years. Irrigation cycle, budding date and rootstock heading procedure all had significant effects. Bud take was greatest on 26 July (49.3%). Irrigation frequency had no significant effect on bud take but the 3-day cycle resulted in the best scion growth. Bend the branches to create shade at the bud site, rather than cutting the rootstock above the bud site resulted in the best bud take (61.1%). The results obtained in this study show that budding at the right time “provides better climatic conditions,” adjusting the irrigation cycle and choosing the best rootstock heading methods after budding, produces satisfactory results.