Abstract:

To obtain the best cutting effect, different kinds of hormones, hormone concentrations, hormone combinations and different types of cuttings were investigated. After treated by IBA, NAA, 2,4-D alone or their combinative solutions, the cuttings were compared in the survival rates, numbers and diameters of roots, and growing tendencies at the fiftieth day. The result shows that not only the young branches but also the old branches can be used as cuttings. For the younger cuttings, the better effect was obtained by treating for 60 min with IBA 20 mg/L + NAA 40 mg/L. The survival rate, root number and root diameter in average of cuttings were 82.2%, 5.50 and 2.00 mm, respectively. Growing tendency of cuttings was strong. But for the elder cuttings, the better effect was obtained by treating for 60 min with IBA 20 mg/L + NAA 60 mg/L. The survival rate, root number and root diameter in average of cuttings were 86.72%, 7.32 and 2.05 mm, respectively. Growing tendency of cuttings was also strong. The cutting effect from treatment by combinative hormones was better than that from hormone alone.