any of several compounds containing potassium,especially soluble compounds such as potassium oxide,potassium chloride,and various potassium sulfates,used chiefly in fertilizers

• 钾盐一种含钾的化合物，尤指如下可溶性化合物：氧化钾、氟化钾以及各种硫酸钾。这些化合物主要用于化肥中