Effects of fertilization and planting density on agronomic traits and yield of maize variety Nanxiao 969

【Objective】Effects of different planting densities and fertilizer amounts on the major agronomic traits and yield of new corn variety Nanxiao 969 were studied to provide scientific and theoretical references for its high yield and efficiency cultivation.【Method】The experiments were carried out by two factors split-plot design,setting the main fertilizer factors for a total of 4 levels,which were A1(N:321.20 kg/ha,P2O5 :107.10 kg/ha,K2O:267.90 kg/ha),A2(N:225.00 kg/ha,P2O5 :75.00 kg/ha,K2O:187.50 kg/ha),A3(N:160.65 kg/ha,P2O5 :53.55 kg/ha,K2O:133.95 kg/ha) and A4(No fertilizer).Four levels on plant densities also set as auxiliary treatments,i.e.B1(45000 plants/ha),B2(52500 plants/ha),B3(60000 plants/ha) and B4(67500 plants/ha),which were arrayed randomly and repeated 3 times.The leaf area index,yield and other agronomic traits of maize were determined.【Result】The plant density and fertilizing amount had significant effects on the yield of Nanxiao 969.In the A1-A4 fertilizer levels,grains perrow,1000-grain weight and grain ratio gradually declined with the fertilizer application in each density.The yield could reach the highest at 6239.40 kg/ha in level A2.The ear length,ear diameter,perrow,1000-grain weight,and yield were also significantly impacted by the density.With the rising of planting density,the ear length,ear diameter,perrow and 1000-grain weight decreased,while the yield increased,which could reach the highest at 6484.50 kg/ha when the density was 67500 plants/ha.【Conclusion】 The yield for Nanxiao 969 could reach the highest at the density of 67500 plants/ha,pure N of 321.30 kg/ha,P2O5 of 107.10 kg/ha,and K2O of 267.90 kg/ha.