穗条生根剂育苗基质和季节对西南桦扦插生根的影响  

Effects of Root-inducing Regulator,Propagation Medium and Season on Rooting of Betula alnoides Cuttings

作　　者：郭文福[1] 蒙彩兰[1] 

机构地区：[1]中国林业科学研究院热带林业实验中心,广西凭祥532600

出　　处：《林业科学研究》2011年第6期788-791,共4页Forest Research

基　　金：国家"十一五"科技支撑专题"西南桦用材林高效培育技术"(2006BAD24B09-02);年度科技部农业科技成果转化项目(2007GB24320393);广西林业局重点项目"西南桦良种选育与示范"(桂林科字[2009]第2-3号)

摘　　要：西南桦（Betula alnoides Buch.-Ham.ex D.Don）是我国西南省（区）造林规模最大的乡土珍贵用材树种。西南桦具有材性优良、容易加工、色泽淡红、不易变形等木材特性,是高级家具、室内装修、木地板的优质材料,经济价值甚高。由于目前育苗用种多采自天然次生林,随着西南桦天然资源的日益贫乏,加剧了造林规模不断扩大与供种量逐渐减少的矛盾；而且，实生苗造林的林木个体问遗传变异较大，林分木材单产较低。The cuttings from scion plucking orchard were used to test the combinations of cutting shoots with root-inducing regulators,media and cutting seasons in order to study the effects of different root-inducing regulators（ABT6 and IBA） and their concentrations,the lignifying degree of cutting shoots,the media types and propagation seasons on rooting ability,rooting number per shoot and rooting length of Betula alnoides.The result showed that tremendous significant differences were observed among different treatments,and the rooting percentage could be higher than 96.67% under the optimal cutting measure when conducted in the season of summer or autumn by using young shoots with apical bud as cutting shoots,treated with a higher concentration of ABT6 and IBA（800-1 000 mg·kg-1）,and planting in the organic light medium which consisted of 80% carbonized pine bark.

关 键 词：西南桦 生根促进剂 轻基质 扦插生根 

分 类 号：S723.132[农业科学—林木遗传育种]