硫酸钾和氯化钾是农村常用钾肥,前者含钾(K_2O)50—52％,后者含钾(K_2O)50—60％,均是速效性钾肥。这两种钾肥,虽然都是生理酸性肥料,但由于所含副成分不同,施入土壤后,对土壤理化性状和不同作物的生长发育等,也有很大影响。为了经济用肥,提高钾肥利用率,使硫酸钾、氯化钾各得其所,施用硫酸钾和氯化钾应作到如下“五要”、“六忌”: Potassium sulphate and potassium chloride are common potassium fertilizers in rural areas. The former contains 50-52% potassium (K2O) and 50-60% potassium (K2O), both of which are quick-acting potash fertilizers. Although both of them are physiological acid fertilizers, the two kinds of potash fertilizer have great influence on the physical and chemical properties of the soil and the growth and development of different crops due to the difference of the subcomponents contained therein. In order to economic fertilizer, improve the utilization rate of potassium, so that potassium sulfate, potassium chloride have their place, the application of potassium sulfate and potassium chloride should be as follows “five to”, “six bogey”: