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叶面喷洒适宜浓度的ＰＰ可明显抑制桃幼树的新梢生长量、新梢粗度、副梢萌发数、副梢长度，促进新梢提早停长，提高叶片叶绿素含量和光合速率，提高越冬期花叶芽抗寒能力。效果最好的是１５００ｐｐｍ喷布两次的处理，２０００ｐｐｍ喷一次处理效果也较好。
Appropriate concentrations of foliar spray PP could significantly inhibit the growth of shoots of young trees, shoots, shoots, shoots, shoots, promote shoots early to stop, increase leaf chlorophyll content and photosynthetic rate, improve winter Period flower buds cold ability. The best effect is 1500ppm spray twice the treatment, 2000ppm spray once the treatment effect is better.