采用 2 0个来自中国各地的土壤样品 ,研究了进口和国产阳离子交换树脂膜埋置法测定土壤中的有效钾的技术 ,结果表明阳离子交换树脂膜埋置法测定土壤有效钾的最佳埋置时间为 2 0min。树脂膜法测定的土壤钾值与中性醋酸铵法测定的土壤有效钾之间具有极显著的相关性 ,进口树脂膜的测定值与中性醋酸铵法测定值间的相关性稍优于国产树脂膜。中性醋酸铵法和树脂膜法测定的土壤钾与植物实际吸钾量间具有极显著的相关性 ,树脂膜法测定值与植物实际吸钾量间的相关性明显优于中性醋酸铵法 ,进口树脂膜稍优于国产树脂膜 A total of 20 soil samples from different parts of China were used to study the technology of measuring the available potassium in soils by the method of embedded and domestic cation exchange resin membrane embedding. The results showed that the best method of cation exchange resin membrane embedding method was to determine the optimal soil available potassium The time is 20min. There was a significant correlation between the soil potassium values ​​measured by the resin membrane method and the soil available potassium determined by the neutral ammonium acetate method. The correlation between the measured value of the imported resin membrane and the neutral ammonium acetate method was slightly better than that of the domestic Resin film. Neutral ammonium acetate and resin membrane method to determine the soil potassium and plant actual absorption of potassium has a significant correlation between the measured value of the resin membrane and the actual amount of potassium was significantly better than the neutral ammonium acetate method , Imported resin film slightly better than the domestic resin film