Abstract:

By methods of field trials and randomized blocks design, the effects of nitrogen fertilizer and density on yield formation characteristics of precision hill-direct-seeding rice was studied in this experiment.The result indicated that different treatment of nitrogen fertilizer and density increased the yield,biological yield ,leaf area index,seed setting rate and grain number per panicle significantly.Biological yield and leaf area index was improved with the increasing amount of the nitrogen fertilizer increasing. within treatments,the actual yield and theoretical yield of N2D2 were most，respectively reach 6.945 t?hm-2 and 8.166 t?hm-2。It is suitable for Production and extension。