Effects of Combined Application of Nitrogenous Fertilizer and Potash Fertilizer at Different Application Ratio in Different Period on Economic Traits and Yield

[Objective]The research aimed to study the effects of combined application of nitrogenous fertilizer and potash fertilizer at different application ratio in different period on the economic traits and the yield of the potato.[Method] Weiyu 3 was taken as the research object.The nitrogenous fertilizer and potash fertilizer were applied as the base fertilizer,fertilizer for seed bed and budding fertilizer.8 treatments were set,and randomized block was arranged.[Result]The effects of nitrogenous fertilizer applied as base fertilizer and fertilizer for seed bed accounting for 40% and budding fertilizer accounting for 20%,and potash fertilizer applied as base fertilizer accounting for 60%,and base fertilizer and budding fertilizer accounting for 20% was the best.Its economic traits showed well,and the yield reached 39 186.0 kg/hm2.Secondly,the economic traits were well,which was the treatment of nitrogenous fertilizer as base fertilizer accounting for 80% and the fertilizer for seed bed and budding fertilizer accounting for 10%,and potash fertilizer as base fertilizer accounting for 80% and budding fertilizer accounting for 20%.The yield reached 35 434.5 kg/hm2.[Conclusion] The research could provide the scientific and reasonable theoretical basis for the field production.