[Objective] To screen the proper planting density for new maize variety Yundan 20. [Method] The agronomic characters,multiresistance and yield of Yundan 20 were researched under six different planting densities. And the effects of planting density on ear characters were analyzed. [Result] Under the condition of enough base fertilizer and rational topdressing,the proper planting density for Yundan 20 was 52 500 plants/hm~2. Thus,the yield was 11 675. 55 kg/hm~2. [Conclusion] This research provides theoretica...
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