果树缺钾诊治有方陈子俊（山东省冠县植物保护站）钾是参与树体正常生理活动、调方树体代谢功能的重要元素。果树缺钾时，因树种不同会出现许多不同的症状，影响果树的生长发育。症状识别：苹果树缺钾：轻微时，叶缘呈紫黑色，随即枯焦呈茶褐色，严重时，整个叶片枯焦；主... Diagnosis and treatment of potassium deficiency in fruit trees Chen Zijun (Shandong Guanxian Plant Protection Station) Potassium is an important element involved in the normal physiological activities of the tree, regulating the metabolic function of the tree. When the fruit tree is deficient in potassium, many different symptoms occur due to the different tree species, which affects the growth and development of the fruit tree. Symptom identification: Apple tree potassium deficiency: slight, the edge of the leaves were purple, then dry brown was brown, serious, the whole leaves Kujiao ...