Study on the Relation of Planting Density and Agronomic Traits and Yield of New Maize Variety Nendan15

In order to definite the appropriate planting density of Nendan15,give full scope to group advantage and achieve high yield,Nendan15 was used as experiment material to study the effect of different planting densities on agronomic traits and yield.The results showed that the plant height,ear height and bare top length increased,and ear length,100-seed weight,yield per ear decreased with the increase of planting density.The highest yield was obtained when the density was 60 000 plant·hm-2.The appropriate density was 52 500 to 67 500 plant·hm-2 under the above-average water and fertilization conditions.