EFFET OF SCIONS TREATMENT PERIOD WITH GROWTH REGULATORS NAA , BA ON GROWTH OF BUDDED ORANGE ON SOUR ORANGE ROOTSTOCK

Abstract

This study was carried at Al-Hindya horticultural station \ Kerbela during the season 2008-2009 to find out the effect of local orange scion treatment with 100 mg \l-1 NAA and 75 mg\l-1 BA and (100 mg\l-1 NAA +75 mg\ l-1 BA ) and control for 3 dipping periods(5 , 10 and 15 minutes ) on the percentage of budding success and the root and vegetative growth characters of the budded seedlings . Sour orange seedlings were used as rootstocks . using RCBD , with three replicates . The results were summarized as follow : - 1- Higher budding success percentage were obtained with treatment of buds by (NAA+BA ) at (100 +75) mg \ l-1 gave (93.39% ) as compared with control (65.55 % ) . The treatment with BA gave 84.44 % , while there was decrease due to NAA (46.16 % ) as compared with the other treatments . 2- the treatment (100 mg\l-1 NAA + 75 mg \ l-1 BA ) showed significant increased in most studied the vegetative and roots characters . 3- Treatment with NAA at 100 mg\l-1 resulted in significant increase in the vegetative and roots characters . 4- Dipping of scions in the growth regulators at 15 minuets period caused of a significant increase the vegetative and root characters . while 5 minuets period gave the lowest means of the characters studied .