辽东南地区不同春玉米品种产量及生长特性研究

通过不同品种、不同密度配置研究春玉米生育进程、物质生产水平以及产量构成,分析不同玉米品种在辽东南地区产量及生长特性,探讨提高产量的关键限制因素。结果表明,丹玉405等稀植大穗型晚熟品种在30 000株/hm2时产量最高;郑单958、农华101等紧凑中熟、中晚熟品种在45 000~60 000株/hm2时产量最高。随密度增加,各品种千粒重下降,穗粒数降低,倒伏率和空秆率随密度增加而增加。

Yield and Growth Traits of Spring Maize in Southeast Region of Liaoning

By set different hybrids and planting densities, spring maize growing stage, matter production and yield component were studied to find the way improving maize yield and understand the key factors limiting the yield in Southeast region of Liaoning province. The results showed that, late maturity hybrids with large ear such as Danyu405 achieved most yield at density of 30 000 plants/ha, middle late maturity hybrids such as Zhengdan958 and Nonghua101 gained most yield during density of 45 000-60 000 plants/ha. Increasing planting density declined the 1 000-kernel weight, kernel number per ear, improving logging rate and barrenness.