EFFECT OF PLANT GROWTH REGULATORS ON BUDDING SUCCESS PERCENTAGE AND GROWTH OF SWEET CHERRY TRANSPLANT (Prunus avium L.)

The study was conducted at the nursery of horticulture station of Akre / Dohuk during the period extending from August 2015 to November 2016. This study was conducted to test the effects of two rootstock diameters and growth regulators on budding success percentage and growth of sweet cherry napoleon cultivar. The treatments tested included two diameter (size) of mahaleb rootstock (big 10-12 mm and small 7-9 mm)±1 and growth regulators (IBA 60 and 120 mg/L, 2,4,5-D 30 and 60 mg/l, Kinetin 20 and 40 mg/l, Kinetin 20+ IBA 60 mg/l, Kinetin 20+ IBA 120 mg/l, Kinetin 40 + IBA 60 mg/l, Kinetin 40+ IBA 120 mg/l). The budding process was performed in 4th of September 2010.

The results showed that the tested root stock diameter caused significant effects on budding success percentages, number of leaves, transplant diameter and transplants height. The treated scions with growth regulators significantly affect the tested traits as well including budding success percentage, number of leaves transplants height and transplant diameter. The highest budding success percentage (95.67%) and the highest transplant height (110.0 cm) were achieved from the interaction between the big root stock diameter and 2, 4, 5-D 30 mg/l. While the highest transplant diameter in big root stock both with the use of kinetin 20+ IBA 120 mg/l.