通过对怒江干热河谷土壤速效钾和缓效钾含量分析以及该区咖啡叶片钾素含量周年变化的测定 ,结果表明 ,怒江干热河谷区土壤速效钾含量和缓效钾含量均较高 ,但干热少雨的气候条件对土壤钾的有效性有一定的影响 ,咖啡叶片钾含量随植株生长发育而发生周期性变化 ,含量高低与气候条件有密切关系 ,咖啡园管理水平对土壤速效钾含量也有一定影响 Based on the analysis of available potassium and slow potassium contents in the dry and cold valley of the Nujiang River and the annual changes of potassium content in the coffee leaves of the Nujiang dry-hot valley, the results showed that the available potassium and slow-acting potassium contents were higher in the dry-hot valley, The climate with less rain had some effect on the availability of soil potassium. The potassium content in coffee leaves changed periodically with the growth and development of plants. The content of potassium in coffee leaves was closely related to the climatic conditions. The management level of coffee plantation also had some effects on the available potassium