Influence Of Fertilization Methods And Propor Tions On The Yield And Fertilizer Utilization Rate Of Rice

In this study,“YLY 9918”and“YLY2”were selected as the experimental material,we examined the different proportion nitrogen,phosphorous and potassium effect on rice effective panicle,grain numbers per ear,fruit-setting rate,1000-grain weight,real production and fertilizer utilization efficiency.The experimental results provide a theoretical basis for scientific fertilization in rice production,and it is of great significance for China to realize the goal of zero-growth of fertilizer and the sustainable development of agriculture in the future.The results of the experiment showed that the effective panicles of the nitrogen deficiency treatment（CL2,CL6）in the conventional fertilization zone and the formula fertilization zone were the lowest,which was significantly lower than other treatments.This shows that the effect of nitrogen fertilizer on promoting effective panicles is greater than that of phosphorus and potassium.The lack of nitrogen fertilizer can significantly reduce the number of effective panicles in rice and thus reduce rice yield.Nitrogen fertilizer is the limiting element for effective panicle number and yield in rice.The utilization rate of fertilizers treated with N1P0K1 and N2P0K2 was the lowest,that is,the utilization rate of nitrogen-potassium fertilizer without phosphate fertilizer was the lowest,indicating that phosphate fertilizer is the limiting factor for rice fertilizer utilization rate.With conventional fertilization methods,phosphorus fertilizers have more absorption of nitrogen fertilizers than potash fertilizers.With the application of formula fertilization,phosphorus fertilizers promote the absorption of potassium fertilizers more than nitrogen fertilizers.In the conventional fertilization zone and formula fertilization zone,the effective panicle number,grain number per panicle,and 1000-grain weight of all-element fertilization（CL1,CL5）were all better,and the yield and mu efficiency were significantly better than any two fertilizers.It shows that the lack of nitrogen fertilizer,phosphate fertilizer,and potash fertilizer have a great influence on rice yield components and yield.The effective panicles,grain number,seed setting rate and yield of each treatment in the formula fertilization area under the 4 environmental conditions were higher than those in the conventional fertilization area,indicating that the formula fertilization is more conducive to increase the effective panicle,grain number,seed setting rate and yield of rice.The yield and benefit of CL5（N₂P₂K₂）treatment were the highest and significantly higher than other treatments,indicating that the application of N,P and K all-element formula can significantly increase the rice yield and economic benefits.