配方施肥对小麦产量、肥料利用率及经济效益的影响OA

To further popularize the soil testing and formulated fertilization technology for wheat and improve fertilizer utilization efficiency,a field experiment on fertilizer use efficiency was conducted with Yangfumai 4 as the test material.The experiment was carried out in Fengle Town,Feixi County,Anhui Province,from October 2023 to June 2024,with two formulated fertilizers of different nutrient ratios selected(formulated fertilization 1 with an N∶P2O5∶K2O ratio of 12.9∶4.7∶5.5;formulated fertilization 2 with an N∶P2O5∶K2O ratio of 12.5∶5.0∶6.5).5 treatments were set for each formulated fertilizer,namely blank control,nitrogen-free,phosphorus-free,potassium-free and formulated fertilization.The effects of different fertilization treatments on wheat yield,yield components,fertilizer use efficiency and economic benefits were determined.The results showed that formulated fertilization significantly promoted the effective panicle number,grain number per panicle,1 000-grain weight and actual yield of wheat.The yields of formulated fertilization 1 and formulated fertilization 2 treatments were 6 232.5 and 6 147.6 kg/hm2,respectively.The nitrogen,phosphorus and potassium use efficiencies of formulated fertilization 1 and formulated fertilization 2 treatments reached 44.7%,25.9%,72.0%and 49.1%,22.1%,66.6%,respectively.The benefit-cost ratios of the two treatments were 1.96 and 1.89,respectively.In conclusion,soil testing and formulated fertilization could increase wheat yield,fertilizer utilization efficiency and benefit-cost ratio.It is recommended that the formulated fertilizer with an N∶P2O5∶K2O ratio of 12.9∶4.7∶5.5 should be applied for wheat production in the study area.