据陈际型(《土壤》1977年6期)介绍,用0.05N盐酸浸提土壤,然后用钾离子电极测定,结果与用1N醋酸铵提取的火焰光度计法的相关性很好.为了进一步研究这个问题,我们选择了几种不同肥力水平的红壤性水稻土,结合田间钾肥试验,采用4种浸提剂,用钾离子电极测定速效钾含量,以选择一种在没有火焰光度计的条件下测定红壤性水稻土速效性钾的方法,为指导钾肥施用提供依据. According to Chen (“Soil”, Issue 6, 1977), the soil was extracted with 0.05 N hydrochloric acid followed by a potassium ion electrode and the results were very good correlation with the flame photometer method extracted with 1 N ammonium acetate. To further In order to study this problem, we selected several red soil paddy soils with different fertility levels. Combined with field potash tests, we used four kinds of extractants to determine the content of available potassium with potassium ion electrode to select a kind of paddy soil without flame photometer The method for determining the available potassium in red paddy soil is provided as a guideline for the application of potassium fertilizer.