基质、促根剂及插穗对杜鹃红山茶扦插生根的影响

摘要

为探索不同处理对杜鹃红山茶硬枝扦插生根的影响,以1年生杜鹃红山茶枝条作为扦插材料,分别探讨基质种类、IBA和NAA的应用、来自枝条不同部位的插穗及插穗留叶片数等因素对扦插生根的影响.结果表明,不同基质对杜鹃红山茶扦插的生根率、愈伤率、根长和生根数等各扦插指标的影响差异达极显著水平,经300 mg/L IBA+ 300 mg/L NAA处理3h后,扦插于混合基质(V珍珠岩∶V椰糠=1∶1)的插穗生根率最高,达76.67％;采用IBA作为促根剂其浓度与处理插穗的时间对插穗的生根率有极显著影响,NAA浓度对于插穗生根率的影响不显著,经400 mg/L IBA+ 100 mg/L NAA处理4h的插穗生根率最高,达80.56％;枝条基部所剪制插穗扦插的生根率明显高于枝条中上部,从生根率角度考虑,选择枝条基部剪制插穗并保留两片半叶为佳.%The research aimed to explore the effects of different treatments on rooting of Camellia azalea hard-wood cutting.Using the one-year-old hardwood of Camellia azalea as cutting materials,the influences of different factors,including cutting mediums,application of IBA and NAA,cutting collection positions and leaf-retention on cutting rooting rate were studied.The results were shown as follows:the different cutting medium presented had a significantly different effects on cutting rooting rate,callus rate,root length,and root number,and the rooting rate was up to 76.67 ％ on the mixed medium (Vperlite∶ Vcoir =1 ∶ 1) with cuttings soaked in 300 mg/L IBA + 300 mg/L NAA for 3 hours.Different IBA concentration and cuttings soaking time significantly affected the rooting rate.Different NAA concentration had no significant effect on the rooting rate.The highest rooting rate (80.56 ％) came from the treatment by 400 mg/L IBA + 100 mg/L NAA for 3 hours soaking.In terms of the cutting rooting rate,cuttings from the basal section of branches and 2.5 leaves left was preferred for C.azalea hardwood cutting.