Top-dressing experiment conducted in Dongxia site indicated that based on basal application of 97. 5 kg N/hm2, 105 kg P2O5/hm2 and 52. 5 kg K2O/hm2, top-dressing affected grain yield and quality remarkably. Top-dressing of 90 kg N/hm2 increased yield by 579. 0kg/hm2 (11. 1%), protein content and wet gluten content increased by 1.3 and 2.3 percentage point, respectively, and dough stability increase was 10. 0min. Based on top-dressing of 90 kg N/hm2 or 90 kg N/hm2 and 60 kg K2O/hm2, top-dressing of 30 kg P2O...