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土施ＰＰ３３３可有效地控制红富士苹果树新梢生长，增加中短枝量，促进花芽的形成，提高产量。但在施用剂量较大或其它因素相互影响下，往往会产生抑制作用过大，产生外围新梢抽不出来（短于２０ｃｍ），果柄过短，果形指数变小等负作用。为克服施用ＰＰ３３３过量的负作用，
Soil application PP333 can effectively control the growth of new shoots of Red Fuji apple trees, increase the amount of middle and short shoots, promote the formation of flower buds and increase the yield. However, in the application of larger doses or other factors, under the influence of each other, tend to produce excessive inhibition, resulting in peripheral shoots out (shorter than 20cm), stalk too short, fruit shape index smaller negative effects. To overcome the negative effects of overdosing with PP333,