采用Ｙｏｓｈｉｄａ营养液，调整其中含Ｋ３μｇ／ｍＬ，培养水稻秧苗。结果表明，分蘖期苗高、苗地上部及根干重增重，分蘖期和孕穗期植株中Ｋ、Ｃａ、Ｍｇ、Ｆｅ营养元素含量高，可以作为筛选耐低钾基因型水稻品种的形态指标和生理指标。高耐低钾水稻品种培养在缺钾营养液（Ｋ３μｇ／ｍＬ）中能抽穗、结实，不耐低钾品种抽穗率极低，且不结实 Using Yoshida nutrient solution, which contains K3μg / mL, the cultivation of rice seedlings. The results showed that the seedling height, shoot dry weight gain, tillering stage and booting stage plant K, Ca, Mg and Fe nutrient content at tillering stage were high, which could be used as the morphological index to screen low-potassium tolerant rice varieties And physiological indicators. The cultivars with high resistance to low potassium were capable of heading, sturdy and intolerant varieties with low potassium content in the potassium deficiency nutrient solution (K3μg / mL)