不同浓度吲哚-3丁酸（IBA）对河北杨硬枝扦插的影响

摘要

This paper is aiming at screening indole - 3 butyric acid (IBA)concentration which is suitable for Popu-lus hopeiensis cutting rooting.One year vigorous and healthy root canes and flat canes of P .hopeiensis were used, with coarseness 0.5~1.0cm,and four plants IBA concentrations including 0 mg kg-1 (control),50 mg kg-1 ,100 mg kg-1 ,1 50 mg kg-1 were set up.Cutting survival rate of treatments with IBA was higher 25.34~36.87% than that in control,especially 100 mg kg-1 processing treatment,survival rate higher 36.87% than control.Gross growth among various concentrations was not significant,but compared with the control,had a certain promoting role.%以河北杨1年生健壮根蘖条或平茬条为材料，通过设置0(对照)、50、100、150 mg kg-14种 IBA 浓度，选取粗度0.5~1.0 cm 的插穗进行扦插试验，以筛选适宜河北杨硬枝扦插生根的 IBA 浓度。结果表明：IBA 处理后的河北杨插条成活率比对照高25.34~36.87个百分点，其中100 mg kg-1处理的成活率最高，比对照高36.87个百分点；各浓度间对生长量影响不显著，但与对照相比，都有一定的促进作用。