用不同浓度的多效唑(PP_(333)),不同时间对3个菊花品种进行了叶面喷施试验,祥细观察其对株型和开花的影响。结果表明:PP_(333)能明显地抑制菊花的茎和叶的生长,使植株矮化,节间缩短;叶片变小,厚度增加;叶色加深,叶绿素含量增加;推迟开花,延长花期。同时,试验结果为合理应用PP_(333)控制菊花株型提供了科学依据。 With different concentrations of paclobutrazol (PP_ (333)), three chrysanthemum varieties were sprayed on leaves at different times to observe their effects on plant type and flowering. The results showed that: PP 333 could significantly inhibit the growth of stems and leaves of chrysanthemum, dwarfing plants and shortening internodes; the leaves became smaller and thicker; the leaf color became deeper and the content of chlorophyll increased; At the same time, the results provided a scientific basis for the rational application of PP_ (333) to control chrysanthemum plant type.