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红星、红富士苹果幼树施用多效唑后，对抑制新梢生长、调节枝条组成、促进花芽形成、提高坐果率、增加幼树产量、控制树冠增长均有明显效果，效果大小与施用方法、时期、药剂浓度和剂量、品种有关，土施比叶喷效果好。土施以３月或９月施入为宜，叶喷的最佳时期为５月上旬。土施的适宜剂量为０．５一１．０ｇ·ｍ~(-２)，叶喷最适浓度为１５００一２０００ｍｇ·１~(-１)。红星比红富士对药剂反应敏感。多效唑施后的持效期土施比叶喷的长，并随着剂量和浓度的增加而延长。土施０．５一１．０ｇ·ｍ~(-２)持效期为２一３年，叶喷１５００一２０００ｍｇ·１~(-１)的持效期仅为１年。
Red Star, Red Fuji apple sapling application of paclobutrazol, inhibition of shoot growth, regulating branch composition, and promote flower bud formation, improve fruit set, increase seedling production, crown control have significant effects, the size and application methods, the duration, Pharmacy concentration and dose, variety, soil spraying than the effect of leaves. Soil facilities to be applied in March or September is appropriate, the best time for leaf spray in early May. The optimum dose of soil spraying was 0.5-1.0 g · m -2, and the optimum spraying concentration was 1500-2000 mg · 1 -1. Red Star is more sensitive to Pharmacy than Red Fuji. Effect of paclobutrazol after the persistence of soil than the leaves sprayed longer, and with the dose and concentration increases. Soil 0.5-1.0g · m -2 persistence period of 2-3 years, leaf spray 1500-2000mg · 1 -1 persistence period of only 1 year.