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不同浓度ABT对高寒地区朝鲜黄杨无性系插穗成活率的影响

2017-07-13陆莹魏彪赵禹宁

安徽农业科学 2017年34期

陆莹 魏彪 赵禹宁

摘要 [目的]筛选适合高寒地区朝鲜黄杨插穗扦插繁殖的最佳ABT浓度。[方法]对沈阳、丹东、大连3个种源地的朝鲜黄杨优选单株进行了扦插试验,研究0(CK)、50、60、70 mg/kg 浓度水平的ABT对朝鲜黄杨插穗成活率的影响。[结果]沈阳、丹东、大连3个种源地插穗扦插成活率分别为63.80%、65.37%、63.25%;对不同浓度ABT来说,分种源看, 60 mg/mg ABT的插穗生根效果最好,生根率分别为78.70%、73.90%、71.20%,平均达到74.60%。在0.05显著性水平下,种源对插穗成活率无显著影响,不同ABT浓度处理对插穗成活率影响显著。[结论]60 mg/kg ABT处理12 h的朝鲜黄杨插穗生根效果最好。

关键词 高寒地区;朝鲜黄杨;扦插

中图分类号 S792.11 文献标识码 A 文章编号 0517-6611(2017)34-0168-02

Abstract [Objective]To screen the optimum ABT concentration for cutting propagation of Buxus microphyllavar.koreana in Alpine Region. [Method]The cutting experiment of preferred individual plant of Buxus microphyllavar.koreana in Shenyang, Dandong, Dalian selected 3 provenances were studied, the effects of 0 (CK), 50, 60 and 70 mg/kg concentrations of ABT on the survival rate of Buxus microphyllavar.koreana cuttings were studied. [Result]Shenyang, Dandong, Dalian 3 provenances of cuttage survival rate were 63.80%, 65.37%, 63.25%,respectively. For different concentrations of ABT and provenances, the rooting rate of cuttings at the concentration of 60 mg/mg ABT was the best, and the rooting rates were 78.7%, 73.90% and 71.20%, respectively, with an average of 74.60%. At 0.05 significant level, provenances had no significant effect on the survival rate of cuttings, and the effects of different ABT concentrations on the survival rate of cuttings were significant. [Conclusion]The rooting rate of 60 mg/kg ABT treated with 12 h was the best.

Key words Alpine Region; Buxus microphyllavar.koreana;Cutting

朝鮮黄杨(Buxus microphyllavar.koreana)为黄杨科(Buxaceae)黄杨属(Bunus)植物,为小叶黄杨(Buxus microphyllavar)的变种[1],为常绿灌木或小乔木,朝鲜黄杨树皮呈灰黄褐色,厚约5 mm,细纵裂。鲜黄杨枝条柔韧,叶厚,光亮,翠绿,植株生长缓慢,萌芽力强,耐修剪,耐寒(黄杨类中最耐寒的种)[2],耐碱,抗烟尘,对氯气等有害气体有较强抗性,是北方园林绿化中珍贵的常绿阔叶树种之一[3]。

朝鲜黄杨主要分布在我国东北南部至华中地区[4]。木材为散孔材,木材纹理斜行;结构甚细至极细,均匀;干后尺寸性稳定,不翘裂;抗虫、耐腐性强;锯解容易,车旋及雕刻性能好,切削面极为光洁细致;油漆后光亮美观。结构细致而均匀,材色淡雅悦目,切削时无坚硬感,最适于作小型雕刻及车旋各种美术工艺品[5]。长期以来,一直被用作象牙及玉石雕刻的木座,以及珍贵图章的优质原料。特别是近年来,随着经济社会的发展,人们对黄杨木制品的需求与日俱增,作为雕刻用材的黄杨木是价比黄金,有价无市。……

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