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用多效唑对4年生李、杏的应用试验表明,多效唑处理李、杏幼树15～20天便表现出明显的抑制效果。李树根际沟灌0.2～1.0克/米~2新梢生长量、节间长度、树高及冠径依次下降了60～70％、30％、25～30％及10～25％,杏树沟灌2～3克/米~2,新梢生长量也下降了63～66％。沟灌和叶喷500～2000ppm处理促进了李和杏幼树成花,每厘米新梢的花芽数提高55～65％,单株开花量提高50～290％。其效果可延续2～3年。多效唑处理对果实发育无不良影响。
With paclobutrazol on the 4-year-old plum, apricot application test showed that paclobutrazol Li, apricot young tree 15 to 20 days showed significant inhibitory effect. In the rhizosphere of plum tree, the growth of shoots of 0.2-1.0 g / m ~ 2 was decreased by 60-70%, 30%, 25-30% and 10-25% in length, internode length, tree height and crown diameter respectively. ~ 3 g / m ~ 2, shoot growth also decreased by 63 ~ 66%. The treatment of furrow irrigation and leaf spray with 500 ~ 2000ppm promoted the flower formation of young plum and apricot tree. The number of flower bud per cm cm increased by 55 ~ 65% and the flowering per plant increased by 50 ~ 290%. The effect can be extended 2 to 3 years. Paclobutrazol treatment had no adverse effect on fruit development.