梅树缺乏氮、磷、钾任何一元素,都会生长不良,其次是缺镁和钾,缺钙仅次于完全区,现将这5种元素缺乏症列检　索表如下,供参考。 1.生长不良,叶片小 2.叶片转淡绿或淡黄绿色,有光泽,产生灼烧状斑点 3.叶片是淡黄绿色,节间生长正常,可产生赤紫色轮状斑点,叶柄、枝条带红色　缺氮 3 Plum lack of nitrogen, phosphorus, potassium any one element, will grow poor, followed by magnesium and potassium deficiency, calcium deficiency in the complete area, now these five elements deficiency syndrome search table is as follows for reference. 1. Bad growth, small leaves 2. Leaves turn green or yellowish green, shiny, burning-like spots 3. Leaves are yellowish green, internode growth is normal, can produce purple-purple round spots, petiole, branches Reddish nitrogen 3