在肥力不同的甘肃河西走廊灌漠土上,采用多点田间试验的方法,进行化肥肥效试验。结果表明:其肥效N>P,氮磷配合一般均有连应效应。氮磷区产量是无肥区产量的函数,函数式为:y=x/(0.201+8.267×10~(-4)x),从无肥区产量可以预测氮磷区小麦最高可得产量,即可以地定产。12个试验平均,无肥区产量占氮磷区产量的60.6％,即小麦最高可得产量的形成,土壤基本肥力所起的作用大于肥料的作用,在中低产田施用化肥的增产效果大于高产田。 In different fertility of Gansu Hexi Corridor irrigation desert soil, the use of more field test methods for fertilizer fertilizer test. The results showed that: the fertilizer efficiency N> P, nitrogen and phosphorus are generally associated with the response effect. The yield of nitrogen and phosphorus is a function of the yield of no-fertilizer area, the functional formula is: y = x / (0.201 + 8.267 × 10 -4 (x)). That can be fixed. The results of 12 experiments showed that the yield of no-fertilizer area accounted for 60.6% of the yield of nitrogen-phosphorus area, that is, the formation of the highest available yield of wheat. The effect of soil basic fertility was greater than that of fertilizers. field.