【摘要】 PP333是一种新型植物生长延缓剂,具有使大丽花植株明显矮化,株型紧凑,叶色深绿的作用,从而提高其观赏价值。在本试验浓度范围(300～200ppm)内,浓度提高对大丽花生长的抑制作用也相应提高,同一浓度对不同品种大丽花的抑制作用有明显差异。另外,PP333还能延迟大丽花的开花期,浓度越高花期越迟。对花朵的颜色、花冠大小及数目则均无不良影响。更多还原

【Abstract】 PP333 belongs to a new type of plant growth retardants, under the condition of applying PP333 to Dahlia Pinnate, it was markedly dwarfed with dark green leaves and a compact plant type, resulting in increasing its ornamental value. In the ranges of PP333 concentrations(300-2000ppm) used in this study, retardation of PP333 on the plant increased with increasing concentrations of PP333. There were significant differences between various varieties of the plant treated by same concentration of PP333. Meanwhile, the PP333 could delay the flowering time of the plant, and the higher the co ncentration of PP333 was used, the latter the flowering time was, but there was not negative effect on colour, size and number of flower.更多还原