不同处理方式对桂花嫩枝扦插成活生根的影响

Effects of Different Treatments on Softwood Cutting Survival and Rooting of Osmanthus fragrans

为探究最佳的桂花扦插繁殖方式,提高多年生桂花母树扦插成活生根率,以生长健壮、无病虫害的当年生半木质化新生枝条为试材,比较分析不同植物生长调节剂种类(萘乙酸(NAA)、吲哚丁酸(IBA))和质量浓度(100、200 mg/L)、处理方法(水剂浸泡处理、乙醇溶液速蘸处理和滑石粉剂处理)以及扦插基质对桂花嫩枝扦插成活生根的影响。结果表明,200 mg/L NAA水剂浸泡处理下桂花插穗成活率最高,达80.89%,其生根率、平均根数和平均根长分别达73.37%、9.47条/株和9.0 cm,与对照组相比分别提高560.99%、84.60%和162.39%;不同扦插基质比较发现,珍珠岩最好,其次为河沙,1份黄心土+2份蛭石或蛭石较差。桂花新生枝条扦插繁殖的最佳组合为:以珍珠岩为基质,200 mg/L NAA水剂浸泡处理2 h。

In order to explore the best propagation mode of Osmanthus fragrans cutting,improve the cutting survival and rooting rate of perennial mother trees,the new semi-lignified branches with strong growth and no diseases and insect pests were used as test materials,the effects of different kinds of plant growth regulators(naphthalene acetic acid(NAA),indole butyric acid(IBA)) and concentrations(100,200 mg/L),treatment methods(water immersion treatment,ethanol solution quick dip treatment,talcum powder treatment) and cutting substrates on the survival roots of cuttings of O.fragrans were compared and analyzed.The results showed that the survival rate of O.fragrans cuttings under 200 mg/L NAA water immersion treatment was the highest,up to 80.89%.The rooting rate,mean root number and mean root length were 73.37%,9.47 pieces/plant and 9.0 cm respectively,which were increased by 560.99%,84.60% and 162.39% compared with the control group.The comparison of different cutting substrates showed that perlite was the best,followed by river sand,and 1 yellow subsoil+2 vermiculite or pure vermiculite was poor.The best combination of cutting propagation of new branches of O.fragrans was to take perlite as the matrix and soak in 200 mg/L NAA for 2 hours.