王向前

摘 要：闽楠[Phoebe bournei （Hemsl.）Yang]具有良好的经济、社会、生态价值，通过闽楠扦插繁殖试验，研究不同扦插基质、不同浓度IBA处理对闽楠扦插生根性状的影响。结果表明：不同扦插基质对闽楠扦插生根率、平均最大根长、生根数均有显著影响，用泥炭土作为基质进行扦插，生根率（80.00%）和平均最大根长（5.44cm）均显著高于细河沙基质和混合基质；不同浓度IBA浓度对扦插生根率和平均最大根长有显著影响，对生根数没有显著影响，当IBA浓度为600mg?L-1时，生根率和平均最大根长均显著高于其他浓度。因此，采用泥炭土作为基质并用600mg?L-1IBA对插穗进行处理具有较好扦插效果。

关键词：闽楠；扦插；生根率

中图分类号 S79 文献标识码 A 文章编号 1007-7731（2017）17-0098-03

Abstract：Phoebe bournei had a good economic，social，ecological value.Cutting propagation test was used for different cutting propagation media and concentrations of rooting reagents to affect rooting rate and root increment of Phoebe bournei. The results indicated that the cutting propagation media had obvious affection on rooting rate，root increment and rooting number of Phoebe bournei. The rooting rate and root increment of Phoebe bournei cutting with mud carbon soil matrix was significantly higher than those with west river sand matrix.The different concentrations of IBA had obvious affection on rooting rate and root increment，but had no obvious affection on cutting number. When the IBA concentration is 600mg/L，the rooting rate and root increment of Phoebe bournei was significantly higher than the others. In summary，cutting with mud carbon soil matrix and treated with 600mg/L IBA had a better cutting effect.

Key words：Phoebe bournei；Cutting；Rooting rate

闽楠[Phoebe bournei（Hemsl.）Yang]，又称楠木，为樟科楠属常绿乔木，是中国特有植物。其树体高大，干型通直，木材具有独特的香气，材质紧密，纹理美观，不翘裂，易加工，是珍贵的用材树种，常用于高档家具、雕刻工艺、造船、建材等。闽楠也是珍贵的园林景观树种，被园林界喻为风景观赏树种中的上品。因其具有良好的经济、社会、生态价值，闽楠的培育利用引起了极大的关注[1-4]。

闽楠生长周期长，天然更新慢，加之人为过度利用，使得闽楠资源极度匮乏，是国家二级珍稀渐危种，供应不能满足市场需求的矛盾依然严峻。虽然我国闽楠人工栽植时间较早，但是相对应的繁育技术研究起步较晚，技术不能满足培育需要的矛盾依然存在。受种子活性的影响，播种育苗具有一定的局限性，且播种育苗产出的苗木形状变异较大，不利于优良性状的遗传。……