| The orthogonal combination design of quadratic regression was adopted in this experiment. Effects of interaction among
density, N,P,K coordinating on the yield of maize were studied by field experiment. Effect of density, N,P,K on the yield of maize were studied quantitatively based on main and single factors effect analysis. The results show that the factors which had a significant impact on yield of maize were density the interactions which had a significant impact on yield of maize were density and N, density and K. The range of density, N,P,K optimal composite scheme were 3 500-3 750 plants/667m2, 9.2~11.5 kg/667m2, 2.7~3.6 kg/667m2, 6.75~7.425 kg/667m2, respectively. |
