Abstract: Using binary quadratic regression general rotational combination, the effects of plant growth regulators (IBA and NAA) on Rhodomyrtus tomentosa root development by cuttage with treatments of different concentrations of IBA or NAA were investigated. The results suggested that both IBA and NAA played positive roles on root development during cutting propagation of R. tomentosa. Compared with NAA, IBA exerted a more significant function on rooting rate, root length and weight. The optimum concentration was IBA 100 mg稬-1and NAA 100 mg稬-1, which was beneficial to survival rate of cutting propagation of R. tomentosa.

Key words: Rhodomyrtus tomentosa, cuttage propagation, growth regulator

摘要： 采用二元二次回归通用旋转组合设计，探讨植物生长调节剂IBA、NAA对桃金娘Rhodomyrtus tomentosa扦插生根的影响。结果显示，适宜浓度的IBA和NAA有利于桃金娘的扦插生根，IBA对生根率、根长和根重的影响更为明显。最佳浓度组合为IBA、NAA各100 mg·L-1，用该组合处理插条，可有效地提高扦插繁殖的成活率及幼苗质量。

关键词: 桃金娘, 扦插繁殖, 生长调节剂