土施和叶面喷施PP333每株有效成分1mg或1.5mg,都明显地减少了砂培条件下杜梨实生苗的营养生长,缩短了节间长度,减少了地上部鲜重和干重、总叶片鲜重、总叶面积和总叶片数,增加了根冠鲜重和干重比。土施还抑制了主根生长,增加了吸收根的粗度、吸收根和侧根占根总鲜重的比例。处理后10天,即表现出明显的抑制作用,有效期约30～45天,有效期的长短与施入量有关,施用量较多,有效期较长。 在田间条件下用PP333处理7年生鸭梨树,春季叶面喷施125ppm或250ppm三次,明显地减少了当年春梢的延长生长,缩短了节间长度,但对当年二次梢和翌年春梢、二次梢生长无明显影响。秋季和早春土施每cm~2主干横截面积77.5mg或155mg有效成分,对当年春梢影响较小,但强烈地抑制了当年二次梢和翌年春梢、二次梢的生长。土施和叶面喷施都明显地增加了翌年的开花数量和产量。土施影响了果实形状,使果柄处的突起消失,同时减弱了果柄的肉质化。 Soil and foliar application of PP333 per plant active ingredient 1mg or 1.5mg, were significantly reduced under sand culture conditions Trichosanthes seedlings vegetative growth, shorten the internode length, reduce the shoot fresh weight and dry weight, Total fresh weight of leaves, total leaf area and total number of leaves increased root fresh weight and dry weight ratio. Soil facilities also inhibited the growth of the main root, increasing the thickness of the root absorption, root absorption and lateral root proportion of the total fresh weight of the root. 10 days after treatment, that showed a significant inhibitory effect, the effective period of about 30 to 45 days, the effective length of the dose and the amount of application, the amount of more effective period longer. In the field conditions with PP333 treatment of 7-year-old pear tree, spraying foliar 125ppm or 250ppm three times in spring, significantly reduce the spring growth of the year, shorten the internode length, but then the second shoot and the following year spring shoots No significant effect on secondary shoot growth. Autumn and early spring each cm ~ 2 main stem cross-sectional area of ​​77.5mg or 155mg active ingredient, the spring shoot less affected, but strongly inhibited the second shoot and the following year spring shoots, the second shoot growth. Soil fertilization and foliar spraying significantly increased the number of flowering and yield of the following year. Soil affected the shape of the fruit so that the protrusions at the stalk disappeared, and at the same time weakened the succulent stalk.