春天,果树管理的关键是严防果树冻害的发生,确保果树安全度过春天。冻害发生部位嫩枝冻害:由于果树停止生长较晚,发育不成熟的嫩枝,其组织不充实,保护性组织不发达,容易受冻害而干枯死亡。枝条冻害:发育正常的枝条,在温度太低时也会发生冻害。受冻害枝条发芽迟,叶片瘦小或畸形,生长不正常。枝干冻害:受冻枝干皮层下陷或开裂,内部由褐变黑,组织死亡,严重时 In spring, the key to fruit tree management is to prevent the occurrence of fruit tree frost damage and ensure the safety of fruit trees through the spring. Frozen damage occurred at the site of twig frost damage: As fruit trees stop growing late, immature shoots, the organization is not full, protective tissue is underdeveloped, vulnerable to frost damage and death. Frozen branches: the development of normal branches, when the temperature is too low will occur frost damage. Frost damage to the branches of late buds, thin leaves or deformities, growth is not normal. Branch dry frost damage: cold cortex subsidence or cracking, internal dark brown, tissue death, serious