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叶面喷施PP_(333),明显抑制了初果期国光苹果新梢的前期生长,处理后两周作用开始明显,处理后七周作用消失,新梢重新迅速生长。叶面喷施B_9与PP_(333)作用相似,抑制效果比PP_(333)略强,有效期也略长。在相同剂量情况下,土施PP_(333)较叶面喷施开始作用时间晚,对秋梢抑制作用强。土施及叶面喷施PP_(333)对成花的促进作用不如B_9显著。试验结果还表明在叶面喷施情况下,PP_(333)在树体内的移动性极差。
PP_ (333) foliar spraying significantly inhibited the early growth of Guoguang apple shoots in early stage, and the effect began to be obvious after two weeks of treatment. After seven weeks of treatment, the effect disappeared and the shoots regrowth rapidly. The effect of foliar spray B_9 was similar to that of PP_ (333), and its inhibitory effect was slightly stronger than that of PP_ (333). Under the same dosage, soil application PP_ (333) started to act later than foliar spray and had a strong inhibitory effect on the shoot tip. Soil and foliar application of PP_ (333) on the promotion of flower is not as significant as B_9. The results also showed that PP_ (333) had very poor mobility in the tree under foliar application.