在研究影响柑桔落果的各种因子中,曾发现座果的高低与激素水平相关,当内源激素水平降低时,应用外源激素能不同程度地控制果实的脱落。在应用激素方面,已证明赤霉素(九二○)对增进座果有良好效果,但是有试验证明,使用赤霉素会不同程度地使果皮增厚,着色延迟,果汁品质降低等缺点。 In studying the various factors affecting the fall of citrus fruits, it has been found that the height of the fruit is related to hormone levels. When the levels of endogenous hormones are reduced, exogenous hormones can control the fruit shedding to varying degrees. In the application of hormones, gibberellin (920) has proved to be effective in improving fruit rests. However, tests have shown that the use of gibberellins may cause thickening of peel, delayed coloring, and poor quality of fruit juices to varying extents.