种植密度和行距配置对高产夏玉米冠层特性及产量的影响

目的]筛选夏玉米适宜的种植密度、行距配置。方法]采用大田试验,设计不同的品种(登海661、郑单958和先玉335)、密度(67 500和90 000株/hm~2)和行距配置(40 cm+80 cm和60 cm+60 cm)构建不同的冠层结构,研究密度和行距配置对不同玉米品种冠层结构、功能及产量的影响。结果]不同品种对于密度和行距配置的调控响应不一致。登海661在90 000株/hm~2、大小行种植,郑单958、先玉335均在90 000株/hm~2、等行距种植时形成的冠层较合理,表现为产量、群体干物质积累量最高。结论]该研究可为夏玉米的种植提供参考。

Effects of Planting Population and Row Spacing Arrangements on Canopy Characteristics and Grain Yield of Summer Corn

Objective] The objective was to screen suitable planting population and row spacing arrangements .Method]With different cano-py structure building by different varieties(Denghai 661,Zhengdan 958 and Xianyu 335), plant population(67500 plants per hectare and 90000 plants per hectare) and row spacing arrangements(40 cm +80 cm and 60 cm +60 cm), we studied the effects of planting population and row spacing arrangements on canopy structure, function and grain yields of summer corn in field. Result] The responds of different varie-ties to plant population and row spacing arrangements were not coincident.Under 90000 plants per hectare condition, with wide-narrow row spacing, the canopy structure of Denghai 661 was reasonable and the highest yield and dry matter appeared.But the best row spacing condition of Zhengdan 958 and Xianyu 335 were normal row spacing, and yield and dry matter accumulation were the highest. Conclusion] The research can offer reference for planting summer maize.