不同宽窄行及播种密度对玉米弘大8号产量的影响

通过对紧凑型玉米弘大8号进行6种不同宽窄行和5种密度的组合试验。探讨紧凑型玉米的最佳宽窄行行距和密度。结果表明: 在不同的宽窄行行距下弘大8号的最佳种植密度不同，最佳种植密度分布79500-91500株/hm2之间；同一密度不同的宽窄行处理，弘大8号的产量不同，宽行80 cm窄行40cm的产量最高。在种植密度较大的条件下，实行宽窄行种植可增产。弘大8号的最佳宽窄行行距和密度组合是：宽行80 cm窄行40cm，密度79500株/hm2，产量为9950 kg/hm2。

Effects of Planting Density and Row Distance on the Yield of A Hybrid Maize Cultivar'Hongda 8'

The suitable wide and narrow row distance and planting density of a newly bred maize hybrid ‘Hongda 8’ was determined by experiments with 6 wide and narrow row treatments under 5 planting densities. Results showed that the optimal planting density of ‘Hongda 8’ varied according to the wide and narrow rows deployment. Comprehensively, the optimal planting density of ‘Hongda 8’ was among 79,500-91,500 plants/hm2. Under a certain planting density level, maize yield varied with the wide and narrow row distance and the highest yield was realized when the wide row distance and narrow row distance reached 80 cm and 40 cm, respectively. Cultivating ‘Hongda 8’ with alternative wide and narrow rows could increase the yield when the crop was planted at a high density. The optimal planting stratedy for ‘Hongda 8’ was 80 cm and 40 cm for the wide and narrow rows alternatively under a planting density of 79,500 plants/hm2 which could lead to a maize production of 9,950 kg/hm2.