不同种植密度对夏玉米产量的影响

Effects of Different Planting Densities on the Yield of Summer Maize

选用登海605(DH605)为试验材料,设置6个种植密度,连续2a研究了不同密度对夏玉米产量的影响。研究结果表明:随种植密度的增加DH605的农艺性状表现出了不同的变化趋势,株高、穗位高均增加;植株抗倒伏能力降低,倒伏率和倒折率显著增加;夏玉米的产量随密度呈先增加后降低的变化趋势,确定了在山东省德州市齐河县推广种植DH605最佳密度为67 500株/hm2,为夏玉米的高产栽培提供理论和技术支持。

Aiming at the effects of different planting densities, we used Denghai605 （DH6OS）as experimental material and 6 planting densities treatment were set up.The results indicated that both plant height and ear height of summer maize increased significantly with the planting densities increased.The ability of resis- tance lodging of summer maize decreased.The yield of summer maize first increased and then decreased with the planting density, reaching a maximum value at 67500 plant /hm2.This study will contribute to the supply theoretical and technical support for high yield cultivation of summer maize in Qihe of Shandong province.