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近几年辽宁东部山区玉米品种结构发生了显著变化,原有玉米品种种植密度一般为4.50万株/hm2左右,近几年推广的耐密玉米品种种植密度为5.55万～6.75
In recent years, the structure of maize varieties in the eastern mountainous areas of Liaoning Province has undergone significant changes. The planting density of the original maize varieties is generally about 450,000 / hm2. In recent years, the planting density of the resistant dense maize varieties is 55,500 ~ 6.75