一、缺钾症状 缺钾使作物抗旱能力下降。缺钾通常从老叶的叶尖和叶缘开始出现白、黄或桔红色褪绿斑点或褪绿条纹。有些品种可出现不规则分布的褪绿斑点,但在所有情况下症状都是从叶尖开始,而叶基部常常仍保持暗绿色。褪绿区坏死,组织死亡,叶片干枯。症状蔓延到幼嫩叶片,最后植株死亡。缺钾植 First, the symptoms of potassium deficiency Potassium drought-reducing ability of crops. Potassium deficiency usually begins with white, yellow or orange-red chlorotic spots or faded stripes from the tip and leaf margin of the old leaves. Some species may have irregularly distributed chlorotic spots, but in all cases the symptoms begin at the tip of the leaf and the base of the leaf often remains dark green. Mucous area necrosis, tissue death, leaves dry. The symptoms spread to young leaves, and finally the plants die. Potassium deficiency plant