Effects of Different Kinds and Concentrations of Plant Growth Regulators on Rooting of Chrysanthemum Cuttings
In order to improve the rooting rate and survival rate of Chrysanthemum cuttings and shorten the seedling cycle,the ef-fects of different kinds and different concentrations of plant growth regulators on the rooting of Chrysanthemum were studied.The re-sults showed that compared with the control group,naphthalene acetic acid(NAA),indolebutyric acid(IBA)and their mixed solu-tions at 250,500,750 and 1 000 mg/kg could significantly promote the rooting of cuttings,and the root growth was good.The best rooting effect was obtained by using NAA solution with a mass concentration of 750 mg/kg or IBA solution with a mass concentra-tion of 1 000 mg/kg alone,and IBA had a more significant promoting effect on the rooting of cuttings.In the range of 250～750 mg/kg mass concentration gradient,the rooting rate,average number of roots and average root length of cuttings treated with NAA and IBA were significantly higher than those treated with two hormones alone.The rooting effect was best when the concentration of NAA and IBA mixed solution was 750 mg/kg.
plant growth regulatorChrysanthemumrooting of cutting
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