Responses of Wheat Yield under Different Fertilization Treatments to Climate Change Based on a 35-Year In Situ Experiment

Fertilization, as one of many important field management practices, can increase crop yields. However, whether different levels fertilization will affect the response wheat yields to inter-annual climate variations and long-term trends is not clear. In this study, 35-year were used investigate responses yield under treatments. The first difference method was de-trend variables stepwise regression analysis quantify yield–climate relationship. experimental design consisted a control treatment (CK without fertilization) three fertilizer treatments: nitrogen, phosphorus, manure (NPM with 120 kg ha?1 N, 26.2 P, 75 t manure), nitrogen phosphorus (NP N P), (M manure). Compared CK treatment, NPM, NP, M treatments increased by an average 201.9, 161.7, 130.6% variability 191.2, 149.3, 144.2%, respectively, during study period (1985–2020). Inter-annual fluctuations in area explained 45, 38, 27, 29% climatic contributed decreases 0.3, 0.7, 1.6, 1.8% for M, treatments, respectively. results show impact on increases increasing level fertilization, while effect fertilization.