果树花芽分化是果树栽培的基础,只有形成足够数量发育健全的花芽,才能获得理想的产量,只有掌握了花芽形成的规律,才能控制果树的大小年,达到高产、稳产的目的。关于果树花芽的分化时期,第一个比较系统地研究的是 Askenasy,以后有许多研究者从事这方面的工作。早期的工作多半是直接观察记录花芽分化的日历日期,一般认为苹 Fruit flower bud differentiation is the basis of fruit tree cultivation. Only when a sufficient number of well-developed flower buds are formed can the ideal yield be obtained. Only by grasping the law of flower bud formation can we control the size and year of fruit trees and achieve the purpose of high yield and stable yield. As for the period of differentiation of flower buds of fruit trees, Askenasy was the first to be studied systematically, and many researchers engaged in this field later. Most of the early work is the direct observation and recording of flower bud differentiation calendar date, generally believed that Apple