摘要
[目的]筛选出醉香含笑的最佳扦插基质和插穗粗度，为产业化开发提供一定理论依据。[方法]以醉香含笑当年生枝条为试验材料，研究11种不同基质、3种规格插穗粗度对醉香含笑扦插生根的影响。[结果]基质和插穗粗度对醉香含笑扦插生根效果有显著影响。11种基质中，泥炭土为最佳基质；插穗在此基质上愈伤率为65．0％，生根率为28．3％，平均根数为1．89个，平均根长为6．28 cm，最大根长为7．63 cm，根系效果指数为0．60。在插穗粗度试验中以细插穗（0．15～0．25 cm）生根率最高，在泥炭土基质中可达55．0％，根系效果指数为0．52；中等插穗（0．25～0．35 cm）生根质量最高，生根率为30％，根系效果指数为0．75。[结论]使用泥炭土基质和粗度为0．15～0．25 cm的细插穗能促进醉香含笑扦插生根。
Abstract
Objective] To screen the optimal growth substrate and cutting diameter of Michelia macclurei Dandy,and to provide certain theoreti-cal foundation for the industrialization development.[Method] With new terminal branches of M.macclurei as the propagating material,we re-searched the effects of11 growth substrates and 3 cutting diameters on the cutting rooting of M.maccul rei.[Result] Growth substrate and cutting diameter showed significant impacts on the cutting rooting of M.ma cclurei.Among the 11 substrates,peat soil was the best.In this substrate,the callus rate was 65.0%;the rooting rate was 28.3%;the average root number,the average root length,the maximum root length and root effect index were 1.89,6.28 cm,7.63 cm and 0.60,respectively.The rooting rate of thin cutting (0.15 -0.25 cm) was the highest,which reached 55% in the peat soil,with the rooting effect index being 0.52.The substrate cutting (0.25-0.35) had the highest rooting quality,the rooting rate was 30.0%,and the rooting effect index was 0.75.[Conclusion] Using peat soil as the substrate and 0.15-0.25 cm cutting diameter promotes the cutting rooting of M.macclurei.
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维普
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