试验研究认为：采取春季土施ＰＰ３３３和６月份对树上辅养枝环剥环割相结合的方法，对乔砧密植红富士苹果幼旺树的生长结果具有非常明显的累加效应，能显著地抑制新梢的营养生长，促进成花结果，比单纯采取其中一项措施，至少提前１年达到早期丰产的目的。 According to the experimental study, the combination of spring soil PP333 and June on the shrub-ring cuttings of tree shrubs had a very significant additive effect on the growth of the young tree of " Inhibit the vegetative growth of new shoots, and promote the flowering result, rather than simply take one of the measures, at least one year ahead of schedule to achieve the purpose of early high yield.