不同外源激素处理对桦叶四蕊槭扦插生根的影响

[目的]研究不同外源激素类型、不同浓度水平以及不同直径插穗对桦叶四蕊槭扦插生根的影响,为探寻高效繁殖体系以及为人工栽培和园林生产提供科学指导。[方法]利用扦插试验和统计分析方法开展研究。[结果](1)经过吲哚乙酸(IAA),吲哚丁酸(IBA),萘乙酸(NAA)和赤霉素(GA)这4种外源激素处理的插穗扦插生根率,均明显高于对照,其中IBA处理的效果最好;(2)在0~400mg/L这4个水平浓度中,IAA,IBA,NAA和GA分别在50,200,50,50mg/L时,所处理的插穗扦插达到其各自生根率的最大值;(3)粗插穗(D≥7mm)的平均生根率最高,达54%,其中以200mg/L的IBA处理效果最好,生根率达到77%。[结论]桦叶四蕊槭扦插生根的最优组合为,9月上旬,选用直径D≥7mm的插穗,用200mg/L的IBA处理。

Effects of Different Exogenous Hormone Treatments on Rootage Rate of Acer Tetramerum

[Objective] In order to find efficient regeneration method,and to provide scientific guidance for artificial cultivation and landscape producing,the study focused on the effects of the type,concentration level of different exogenous hormones and cutting diameter of Acer tetramerum on the cutting rootage.[Methods] The study was carried out by cuttage experiment and statistical analysis.[Results] (1) The rooting rates of cutting propagation in the treatments of IAA(indole-3-acetic acid),IBA(indole butyric acid),NAA(1-naphthyl acetic acid) and GA(gibberellin acid) were significantly higher than those of controlled group,among which,the treatment of IBA performed the best.(2) The rootage rates of cutting propagation reached its maximum value at the concentration levels of 50 mg/L of IAA,200 mg/L of IBA,50 mg/L of NAA and 50 mg/L of GA,respectively.(3) The maximal average rootage rates of thick cutting(D≥7 mm)reached 54％.At this cutting thick,the highest rootage rate(77％) was recorded in the treatment of IBA at concentration level of 200 mg/L.[Conclusion] The optimal combination of cutting rooting for Acer tetramerum is as follows:in early September,with the diameter＞7 mm,and using 200 mg/L IBA.