Study on the Efficiency of Nitrogen,Phosphorus,and Potassium Fertilizer Combination Application on the Yield of Pearl Red Adzuki Bean in Northern Cold Regions
In order to solve the problems of insufficient fertilizer supply and low yield of red adzuki beans in northern cold regions caused by the unreasonable proportion of nitrogen,phosphorus,and potassium fertilizers,a three factor five level quadratic orthogonal rotation combination design was adopted from 2021 to 2022 to study the effect of different fertilizer ratios of nitrogen,phosphorus,and potassium fertilizers on the yield characteristics of red adzuki beans,and to construct a fertilizer effect function model and the optimal fertilization plan.The research results indicate that different combinations of nitrogen,phosphorus,and potassium fertilizers have a significant impact on the yield of red adzuki beans.Among them,nitrogen and phosphorus fertilizers have a significant impact on yield factors,while potassium fertilizer has no significant impact on yield factors.The specific manifestation is phosphorus fertilizer＞nitrogen fertilizer＞potassium fertilizer;And through the construction of a comprehensive efficiency model of nitrogen,phosphorus,and potassium factors,it was determined that the reasonable and optimized fertilization mode for red bean yields greater than 1750 kg·hm-2 was determined.Among them,the N application rate was 76.071～81.203 kg·hm-2,the P2O5 application rate was 101.556～105.788 kg·hm-2,and the K2O application rate was 63.275～69.242 kg·hm-2;The ratio of pure N∶P2O5∶K2O for each factor is 1∶1.32∶0.843.
cold region red beancombination application of nitrogen,phosphorus,and potassium fertilizersred bean yieldfertilizer effect function model
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