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PP333是一种植物生长抑制剂,许多研究结果表明,应用于苹果、梨、桃、杏、和樱桃等果树均取得了明显效果。使用后通过干扰内源赤霉素的合成,从而抑制新梢的营养生长,使新梢及节间缩短,特别是密植栽培,为达到早结果早丰产的预期目的,能起到良好的调控作用,抑制其营养生长,起到致矮早结果的作用.一、PP333对苹果树的形态反应据Willams M·W研究(1979),在短枝型元帅/实生砧和金冠/M7苹果上喷布1000ppm和2000ppm的PP333后,生长量减小10—20％,第二年80—90％的枝条受到抑制。对6年生澳洲青苹/M26苹果在树干周围每平方米内施入0.25克和0.5克PP333,节间的伸长明显受到抑制,从而新梢变短。在4年生国光苹果进行试验,处理当年即可
PP333 is a plant growth inhibitor. Many studies have shown that the application of PP333 to apples, pears, peaches, apricots and cherries has achieved remarkable results. After use by interfering with the synthesis of endogenous gibberellin, thereby inhibiting the vegetative growth of shoots, so that the shoots and internodes shortened, especially close planting, in order to achieve the early results of the early bumper crop can play a good regulatory role , Inhibit their vegetative growth and play a role in short-term results.First, the morphological response of PP333 to the apple tree According to the Willams M · W study (1979), in the short sprocket Marshal / anvil and Golden Delicious / M7 apples spray After 1000 ppm and 2000 ppm of PP333, the amount of growth was reduced by 10-20% and 80-90% of the branches were inhibited the following year. The 6-year-old Australian green apple / M26 apple was infested with 0.25 g and 0.5 g of PP333 per square meter around the tree trunk, and the internodal elongation was significantly suppressed and thus the shoots became shorter. In the 4-year National Apple test, the year can be