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对采自全国各地 2 0个土壤样品进行测定 .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和植物实际吸钾量之间具有极显著的相关性 .国产树脂膜可代替进口树脂膜用于土壤有效钾测定
The soil samples collected from 20 soil samples from all over the country were measured.The results showed that the optimum embedding time for soil available potassium in the cation exchange resin membrane embedding method was 20 min.The soil potassium values determined by resin membrane method were similar to those of neutral ammonium acetate Method measured soil available potassium and the actual amount of potassium absorption between the plant has a significant correlation between the domestic resin film can replace imported resin film for soil available potassium determination