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1985～1988年对砀山酥梨叶面喷布1000～6000ppmPP333处理,结果均能显著地抑制新梢生长,节间变短,节间数目变少;而单叶面积和比叶重变化不大,叶绿素含量和叶片中的总糖、可溶性糖增高。PP333使幼树花芽形成率、单枝座果数均有提高,但随喷布浓度的增大,抑制生长效应增强,而成花率
From 1985 to 1988, the shoots of Dangshansu pear were sprayed with 1000 ~ 6000ppm PP333, the growth of shoots was significantly inhibited, the internodes shortened and the number of internodes decreased. However, the single leaf area and specific leaf weight did not change much, Chlorophyll content and leaf total sugar, soluble sugar increased. PP333 increased the formation rate of flower buds and the number of single-stalked fruit, but increased the inhibitory effect on growth with the increase of spraying concentration,