非洲凤仙的矮化处理研究

Study on Dwarfing of Impatiens walleriana

[目的]针对不同的生长抑制剂种类和浓度对非洲凤仙(Impatiens walleriana)种苗出圃不及时造成的徒长进行研究,找到合适的生长抑制剂种类和浓度。[方法]以非洲凤仙穴盘苗为材料,设置矮壮素(500、1 000、2 000 mg/L)、B9(500、1 000、2 000 mg/L)和多效唑(5、10、20 mg/L)3种生长抑制剂,以喷施清水为对照,测定株高、下胚轴长、最大节间长和叶片数。[结果]试验表明,施用3种生长抑制剂后均能不同程度地抑制非洲凤仙种苗的株高和最大节间长,同一种生长抑制剂随着浓度的增加,其抑制效果逐渐增强;但是对非洲凤仙种苗的下胚轴长和叶片数没有显著影响。施用矮壮素以1 000 mg/L合适,B9浓度应高于2 000 mg/L,而多效唑浓度应低于5 mg/L。[结论]研究对花卉种苗产业化具有重要意义。

[Objective] To study different growth inhibitor species and concentration on Impatiens walleriana and obtain optimal growth inhibitor and concentration. [Method] To study the effect of different growth inhibitors on height,hypocotyl length,longest internode and leaves of seedlings of Impatiens walleriana,we designed CK（ water）,chlormequat chloride（ 500,1 000,2 000 mg / L）,B9（ 500,1 000,2 000 mg/L）and paclobutrazol（ 5,10,20 mg / L）. [Result] The results showed that： growth inhibitors could decrease the height and longest internode of seedlings of Impatiens walleriana. The dwarfing effects of one growth inhibitor increased with the concentration. The results of hypocotyl length and leaves had no significant differences with growth inhibitors. The optimal concentration was chlormequat chloride 1 000 mg / L,B9 concentration should be more than 2 000 mg / L and paclobutrazol concentration should be less than 5 mg / L. [Conclusion]The study has significance on flower seedling industry.