冻害是指果树在休眠期受低温的伤害,而使树体受伤或死亡,对果树的生产威胁很大。一、冻害的表现果树的不同部位,发生冻害的表现也不同。1、花芽。受冻严重时,内部变褐色,外部芽鳞松散,后期干缩枯萎,一触即落。受冻较轻时,部分花尚能开花结实,但发育迟缓,易出现畸形。 Frost damage refers to the fruit trees in the dormant period of low temperature damage, leaving the tree body injury or death, the threat to the production of fruit trees. First, the performance of frost damage Fruit trees in different parts of the occurrence of frost damage is also different. 1, flower buds. Serious cold, the internal brown, external bud scales loose, dry shrinkage late blink, touch at a stroke. Frozen lighter, some flowers still able to flowering, but stunted, prone to deformity.