黄榆硬枝扦插繁殖技术

Propagation techniques of hardwood cutting in Ulmus macrocarpa

为探索黄榆硬枝扦插繁殖的可行性及其相关技术,以黄榆2年生容器播种苗茎段为材料,研究扦插基质、下切口形状及GGR处理对黄榆硬枝扦插成活率和苗木质量的影响。结果表明:黄榆的硬枝扦插生根能力较好,不同基质、插穗下切口形状及GGR处理对黄榆硬枝扦插成活率、扦插苗的苗高、新枝数量、茎生物量、根生物量及侧根数量并无显著影响,生产实践中可以采用草炭作为扦插生根基质,插穗下切口采用双斜面,使用质量浓度100 mg/L的GGR溶液浸泡处理进行黄榆硬枝扦插繁殖。

In order to explore feasibility of hardwood cutting propagation in Ulmus macrocarpa and some related techniques, taking the stems of two years container seedlings in U. macrocarpa as research materials, the effects of medium, cut shape and exogenous GGR treatments on survival rate and cutting seedling quality were investigated. The results show that U. macrocarpa has a good rooting ability for hardwood cutting. The different treatments of medium, cut shape and exogenous GGR have no signiifcant effects on survival ratio, seedling height, new branch number, stem biomass, root biomass and lateral root number. In production practice, to select peat as cutting medium, to use double-bevelling cut shape and to treat cutting slips by 100 mg/L GGR solution are suitable for hardwood cutting propagation in U. macrocarpa.