疏花疏果的时间越早越好,且疏花比疏果更能节约养分,但在晚霜来临迟或其它自然灾害常发生的果树栽培区不宜疏花。疏花多在盛花初期到盛花末期进行;疏果在谢花后一周开始或在六月生理落果后进行,一般在落花后30天内完成,早疏可以节约养分,提高座果率,促进当年花芽分化,迟疏可以选择好果。 疏花疏果的原则是因树定产,按枝定量,看台留果,均匀分布,合理负载。红玉、国光等中型果,叶果比30～40:1,印度、元帅等大型果40～50:1;枝果比,壮树3～4:1,弱树4～5:1;就品种而言,疏除顺序为:金冠、印 Thinning thinning the sooner the better, and thinner than sparse fruit to save more nutrients, but late in the late frost or other natural disasters often occur in fruit cultivation areas should not be flowering. Thinning flowers in the early bloom to the end of the full flowering; thinning in Xie week after the start or physiological drop in June after the fruit is generally completed within 30 days after falling, early sparse can save nutrients, improve fruit set rate, and promote the bud Differentiation, lateness can choose good results. The principle of thinning and thinning is due to the tree fixed production, according to the amount of sticks, the stands remain fruit, uniform distribution, a reasonable load. Red jade, Guoguang and other medium-sized fruit, leaf fruit than 30 ~ 40: 1, India, Marshal and other large fruit 40 ~ 50: 1; branch to fruit ratio, strong tree 3 ~ 4: 1, weak tree 4 ~ 5: 1; Varieties, thinning order: Golden Delicious, India