Effects of IBA Concentrations & Treatment Time on Softwood Cuttings of Syringa vulgaris
Selected twigs of Syringavulgaris as test material,using IBA as growth regulator,effects of different IBA concentrations & treatment time on root growth for softwood cuttings of Syringa vulgaris were studied.Result shows that:IBA rooting agent have significant role on promoting rooting for softwood cuttings of Syringavulgar-is;adopting 140 mg L-1 IBA with 0.5 h can obtain the optimal effect;callus appear three days in advance and the rooting time four days ahead;the rooting rate is 46.17% higher than that of CK;the average root number is 7.03 pieces more than that of CK;the longest root length is 5.01 cm longer than that of CK;the mean root length is 126.94% higher than that of CK.