利用３Ｈ－ＰＰ３３３示踪法研究了土施ＰＰ３３３在辽伏苹果幼树体内的分配规律。结果表明，ＰＰ３３３由木质部运输，在韧皮部积累，并向叶片扩散，以短梢中含量最高，长梢叶片中由基向上含量渐多，而中梢叶由基向上渐少，网状吸收根含量少于豆芽状延伸根。上施ＰＰ３３３发挥抑制作用，自施入时起约需１个月，而喷施仅需１周，两者结合抑制效应最佳。当ＰＰ３３３施用过量时，于花后２周喷施１００～３００ＰＰｍＧＡ３，可有效地解除ＰＰ３３３的抑制作用，新梢生长量和叶面积增大，蛋白质合成增强，气孔阻力变小，蒸腾强度变大，微量元素的叶含量发生变化，对果实品质无不良影响。经综合性状比较，以２００ＰＰｍＧＡ。喷施效果较佳。 The distribution of soil PP333 in young apple trees of Liaoyu was studied by 3H-PP333 tracer method. The results showed that PP333 was transported by the xylem and accumulated in the phloem and diffused into the leaves. The contents of the shoots in the shoots were the highest, the content of shoots in the shoots was gradually increased, Less than bean sprouts extending roots. On the exertion of exerting inhibitory effect on PP333, it takes about 1 month from the time of application, and the spraying only needs 1 week, and the combination of the two has the best inhibitory effect. When PP333 was applied in excess, spraying 100 ~ 300PPmGA3 2 weeks after anthesis could effectively relieve the inhibitory effect of PP333. The shoot growth and leaf area increased, the protein synthesis increased, the stomatal resistance decreased, and the transpiration intensity increased. Leaf content of trace elements changes, no adverse impact on the quality of the fruit. After the comprehensive trait compared to 200PPmGA. Spraying effect better.