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