While K fertilization under NP treatment enhances wheat yield, it has no obvious effect on wheat yield under N application in fluvo-aquic and cinnamon soils.

• 潮土和褐土在施用氮磷的基础上增施钾肥一定程度上可提高小麦产量，在施氮的基础上增施钾肥对小麦产量无明显提高。