柳桉组培苗嫩枝扦插繁殖技术

Softwood Cutting from Tissue Culture Shoots of Eucalyptus saligna

为降低生产成本，加快繁殖速度，选取柳桉组培苗采穗母株上的半木质化枝条为试材，开展了嫩枝扦插试验。结果表明：生长激素IBA的浓度、扦插基质和组培苗插穗母株的年龄是影响柳桉嫩枝扦插育苗生根的重要因素，但IBA的处理时间以及IBA浓度与处理时间的交互作用对生根无显著影响；从1—2年生的组培苗采穗母株上选取穗条，以黄心土：糠壳灰（V：V=3：1）为扦插基质，插穗用IBA100mg／L浸泡处理0．5h是柳桉嫩枝扦插的最佳处理组合，其生根率达90％以上，平均每株生根数达5条以上。

Experiments on softwood cutting techniques from plantlet of Eucalyptus saligna were conducted and the results indicated： the IBA concentration, the medium and the year of the mother plant were important factors influenced rooting, but IBA processing time and the interactions of IBA concentration and processing time had no significant effect on the rooting; treated with the best treatment combination that scions from the 1- 2 year-old of the tissue culture mother plant, the mixed medium containing yellow subsoil： bran ash （ V ： V = 3 ： 1 ） and IBA 100 mg/L processing 0.5 h, the rooting rate could reach up to more than 90% and the root number more than 5.