| he effect of different fertilizing treatments on dryland wheat yield and water and fertilizer use efficiency was studied.The results show that: The combination of N and P application has the highest fertilizing contribution rate, with a wheat yield of 5 099.8 kg·hm-2 and an increasing rate of 21.5%;the yield-increasing rate of the combination of N and P application is 14.0% and 18.4% higher than that of N application and P application separately, and there is obviously positive interaction;the increasing rate of wheat yield of the single application of organic manure is 6.63%, 4.12% and 11.3% higher than that of the combination of N and M, P and M, NP and M respectively.Fertilizer complication application can increase wheat yield, water use efficiency and fertilizer utilization, and the complication application of organic manure and N and P can increase fertilizer use efficiency of N and P by 17.71 and 12.55 percentage points;the combination of N and P can both increase the fertilizer use efficiency of N and P, with15.53% of the contribution ratio of fertilizer component of N and 12.26% of P, which can reduce water consumption coefficient by 21.4%, and increase water use efficiency by 17.57%. |