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秋季土施或春季喷施PP333能极显著抑制东魁杨海幼树的新梢、新根生长,控冠效应极显著：土施比喷施的效果好，春季或夏季喷施500PPm的PP333两次．能使6～7年生少花树的成花枝率和花穗质量极显著提高；但春季开花前后喷施PP333后导致叶片中碳水化合物向根部运转,对提高杨梅座果率效果不显著。
Soil application in autumn or spraying PP333 in spring can significantly inhibit the growth of new shoots and roots of young seedlings in Dongkui Yanghai and control the crown effect very significantly: soil fertilization is better than spraying, spraying 500 PPm PP333 in spring or summer Times. However, spraying PP333 before and after flowering in spring resulted in the operation of carbohydrates in the leaves to the roots, which did not significantly improve the fruit rate of the bayberry fruit.