Effects of Nitrogen and Phosphorus Application Rates on Rice Yield Components

The influence of the application amount of nitrogen and Phosphorus fertilizer on wheat yield and relevant properties were investigated with field experiments.Fertilizer response functions of nitrogen and Phosphorus for wheat were established in this study.The result shows that spike number,grains per spike,and yield of wheat were influenced significantly by nitrogen,but not by phosphorus.The suitable application amount of nitrogen fertilizer is from 137 to 407kg/hm2 in this region.For wheat yield,the average ratio of dependence on soil fertility was about 63% in this experiment.