IBA生根剂对3个杜鹃花品种嫩枝扦插生根的影响  

IBA Rooting Hormone on the Rooting of Softwood Cuttings of Three Rhododendron Cultivars

作　　者：赵冰[1] 张冬林[2] 

机构地区：[1]西北农林科技大学,杨凌712100 [2]乔治亚大学

出　　处：《东北林业大学学报》2014年第7期83-86,共4页Journal of Northeast Forestry University

基　　金：国家自然科学基金项目(K305021110);陕西省自然科学基金项目(2012JQ3008)

摘　　要：选用3个杜鹃花品种Rhododendron‘Orchid Lights’,R.‘Millennium’,R.‘Pink and Sweet’的嫩枝为插穗,以V(泥炭)∶V(珍珠岩)∶V(3Lmix)=2∶2∶1为扦插基质,以不同施用方法和不同质量浓度的吲哚丁酸钾盐(K-IBA)处理插穗,在全光照自动间歇喷雾下进行嫩枝扦插试验。结果表明:不同品种间扦插生根率、平均根长和根体积差异均达到极显著水平;3个杜鹃花品种的生根效果以品种R.‘Millennium’最好,R.‘Pink and Sweet’最差,说明品种效应明显。低质量浓度的液态K-IBA对3个品种的生根有明显的促进作用,液态K-IBA质量浓度为1000 mg·L-1时对R.‘Orchid Lights’和R.‘Pink and Sweet’品种的生根效果最好,液态K-IBA质量浓度为3000mg·L-1时对品种R.‘Millennium’的处理效果较好。2种不同IBA(K-IBA和Hormodin)的7种处理方法对3个品种插穗的生根率、平均根长和根的体积具有显著性影响。With Rhododendron ＇ Orchid Lights＇ , R. ＇ Millennium＇ and R. ＇ Pink and Sweet＇ , the softwood terminal cuttings of three cultivars were treated with seven different IBA contents, then planted in the rooting medium （peat ： perlite ： 3Lmix= 2 ： 2 ： 1 ） in a greenhouse with automatic inter-mittent mist system. There was significant difference in rooting rate, rooting length and rooting ball volume between three cultivars. R. ＇ Millennium＇ had the highest rooting ability, followed by R. ＇ Orchid Lights＇ and ＇ Pink and Sweet＇. It was more benefit to the rooting of three Rhododendron cuhivars if IBA was liq uid and the concentration was low, liquid 1 000 mg · L-1 K-IBA was preferable for the rooting of R. ＇ Orchid Lights＇ and R. ＇Pink and Sweet＇ , and R. ＇ Millennium＇ had the best rooting effect when liquid K-IBA was 3 000 mg · L-1. There was significant difference among seven IBA treatments on rooting rate, rooting length and rooting volume between three Rhodo dendron cultivars.

关 键 词：杜鹃花 IBA 扦插 生根率 

分 类 号：Q945.78[生物学—植物学]