Exploration of the Application Effect and Optimal Fertilization Amount of Nitrogen，Phosphorus，and Potassium Fertilizer on Rice
[Objective]The aim was to study and explore the best fertilization model for rice production,and provide scientific basis for the comprehensive promotion of soil testing and formula fertilization.[Method]According to the technical specifications of soil testing and formula fertilization of the Ministry of Agriculture and Rural Affairs,combined with the basic situation of rice production in Dongyang city,Jinhua city,Zhejiang province,and referring to the local customary fertilization level,the field experiments of different fertilization treatments of rice were set up to obtain the function equation of fertilizer effect.[Result]The application of different ratios of nitrogen,phosphorus and potassium fertilizer had different effects on rice yield,and the effects of three fertilization factors on rice yield were nitrogen>phosphorus>potassium.The highest yield of rice in this experiment was 8 128.5 kg/hm2,which was 3 466.5 kg/hm2 higher than that in the non-fertilizer area,with an increase of 74.4%.[Conclusion]According to the fertilizer effect function of three nutrient elements and the measured yield of the experiment,considering the factors such as yield and economic cost,combined with the actual local agricultural production,the optimum fertilization amount of rice in Dongyang city was recommended:N 235.35 kg/hm2,P2O559.55 kg/hm2,K2O 89.25 kg/hm2.
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