The Effect of Planting Density on Agronomic Characteristics and Yield of Jingtian No.5 Super-sweet Corn

The paper explores the effect of different planting density on agronomic characteristics and the yield of Jingtian No.5 super-sweet corn.The results show that the fresh ear weight decreases while the yield increases with the increasing density under different density such as 4.2×104,4.8×104,5.4×104,6.0×104plants·hm-2.As for the growth process and ear characteristics of Jingtian No.5,the harvest time is advanced and the growth period is shortened in the density of 6.0×104plants·hm-2;and the plant and ear height are raised.But the ear characters become worse,the ear length becomes shorter and the ear diameter becomes more tapering;the ear row number increases first and then decreases while the length of bald tip decreases first and then increases.The kernels per row and grains per ear decrease.Comprehensive research shows that the best planting density for autumn Jingtian No.5 super-sweet corn is 6.0×104plants·hm-2in Nanjing.