黄泛冲积石灰性土壤在适宜施氮水平下磷钾不同用量及配比对小麦生长的影响表现为:(1)磷肥以中量施用水平(每公顷施用P2O5120kg)增产效果最好,分别比未施磷、低量施用水平(每公顷用P2O548kg)增产30.82%、20.27%,高量施用水平(每公顷施用P2O5192kg),虽然比中量施用水平表现出增产,但增产幅度很小,只有2.85%;(2)钾肥对小麦的增产效应小于磷肥,只有在施用磷肥的基础上配施钾肥,才能使钾的效应得到充分发挥;(3)小麦全生育期氮磷钾施用比例1∶0.5∶0.5为最佳,每公顷施用N240kg、P2O5120kg、K2O120kg效益最高。 The effects of different phosphorus and potassium dosages and their ratios on the wheat growth under the suitable N application level were as follows: (1) The effect of medium phosphorus application (P2O5120kg per hectare) yield was the best, Phosphorus application rate (P2O548kg / ha) increased 30.82%, 20.27%, P2O5192kg per hectare. Although the yield was higher than the middle level, the rate of increase was only 2.85% ; (2) The yield-increasing effect of potash fertilizer on wheat is less than that of phosphate fertilizer. Only when potassium fertilizer is applied on the basis of applying phosphate fertilizer, can the potassium effect be fully exerted. (3) The proportion of NPK in wheat during the whole growing period is 1: 0.5: 0.5 For the best, N240kg per hectare, P2O5120kg, K2O120kg benefit the most.