人畜破坏、机械损害、冻害、风害、日灼、雹灾等往往会引起果树体外的创伤。受伤轻者,生长不正常,降低果实产量和品质;受伤重者,则会死亡。外伤的治疗方法有以下几种: 一、切除:受伤的枝条常招致病害,引起面积更大更重创伤,所以必须切除。方法是短截和疏除,注意剪口要 Human and animal damage, mechanical damage, frost damage, wind damage, sunburn, hail and other diseases often cause fruit trees in vitro trauma. Light injury, growth is not normal, reducing fruit yield and quality; injured serious, it will die. The treatment of trauma are the following: First, the removal: Injured branches often lead to disease, causing a larger area more trauma, it must be removed. Method is short cut and sparse, pay attention to notches