PP_(333)是一种新的植物生长延缓剂,将其施用于红果幼树能抑制红果的营养生长,促进枝条发生,以控制幼树冠形,还可促进花芽分化,提高红果早期产量。最佳施用量和方法是于秋季施入土壤,每株施1克。但要注意在施用PP_(333)后进行疏花疏果和喷赤霉素,以提高座果率。 PP_ (333) is a new plant growth retarding agent, applied to saplings can inhibit the growth of red fruits, promote the occurrence of shoots, to control sapling crown, but also promote the flower bud differentiation and improve the early yield of red fruit. The best application rates and methods are applied to the soil in the autumn, each plant Shi Shi grams. However, care should be taken to improve the fruit set rate after the application of PP_ (333).