果树冻害是果树在休眠期因受０℃以下低温的伤害而使细胞和组织受伤或死亡，是一种常见的自然灾害。１．果树冻害的症状　树干受冻，有时形成纵裂，树皮沿裂缝脱离木质部，严重冻伤时会整株死亡；枝条受冻常与抽条同时出现，严重冻害时，自外向内各级枝条都可冻死，稍重时枝条? Fruit tree frost damage is a common natural disaster when the fruit tree is damaged or killed due to the hypothermia below 0 ℃ in the dormant period. 1. Symptoms of fruit tree frost damage trunk cold, and sometimes the formation of longitudinal split bark along the cracks from the xylem, the whole plant died of severe frostbite; branches often cold and pumping at the same time, severe frost damage, from outside to inside branches at all levels Frozen to death, slightly heavier branches?