前言提高柑桔座果率的生理机制主要是增加果实的激素物质,从而增强幼果调运和吸收树体内部营养物质的能办,阻止果胶物质的减少,延缓果柄离层的发育。柑桔的保果技术之一,就是花期或果实生长期喷布外源激素以减少幼果的脱落。过去,国内外在应用2.4—D赤霉素保果的研究上,已有大量成功的报告;而对三十烷醇的保果效应,则仍在争议之中。 Preface The physiological mechanism to improve the fruitsetting rate of citrus fruits is mainly to increase the hormone substances in the fruits so as to enhance the transportation and absorption of nutrients inside the tree and prevent the reduction of pectin substances and delay the development of fruit stems. One of the fruit preservation techniques of citrus is to spray exogenous hormones during flowering or fruit growth so as to reduce the shedding of young fruits. In the past, there have been a large number of successful reports on the application of 2.4-D gibberellic acid in fruits and vegetables at home and abroad. However, the fruit protection effect of triacontanol remains controversial.