脐腐病是一种生理性病害,引起这种病的原因很多,尤其是越夏番茄定植时,整地质量差或不整地,导致土壤耕层浅,根系不深扎。再加上定苗后管理上以促为主不蹲苗,致使植株根系发育不良,影响中后期番茄对钙的吸收,导致番茄脐腐病发病率高。尤其番茄进入结果盛期后,当地菜农都习惯连续冲施高钾型肥料,以促进膨果,导致土壤含钾量过高,由于钾离子的竞争能力强于 Umbilical rot disease is a physiological disease, causing the disease for many reasons, especially in the summer planting tomato, poor or irregular land preparation, resulting in shallow soil layer, the root system is not deep. Coupled with Dingmiao management to promote the main non-squat seedlings, resulting in poor plant roots, affecting the absorption of calcium in the late tomato, leading to the high incidence of tomato umbilical rot. In particular, tomato into the results after the peak, the local farmers are accustomed to continuous high potassium fertilizer, in order to promote the expansion of fruit, resulting in high potassium content in the soil, due to potassium ion stronger than the competitive