密植对玉米杂交种产量及相关农艺性状的影响

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中图分类号：S565 文献标识码：A 文章编号：0488-5368（2025）06-0047-05

Abstract： A field experiment was conducted to investigate the effcts of varying planting densities on the yield and agronomic traits of the maize hybrid‘Luoyul14’.The results indicated that the average yield per 667 （204号 m2 initiallyincreased and then declined with increasing planting density.The highest yield was observed at a density of 4 500 plants per 667 m2 ，reaching 685.22kg/667m2 . In contrast， yield per plant decreased progressively as planting density increased.Average yield per 667 m showed asignificant positive correlation with thousand-kernel weight，kernels per row，rows per ear，ear length，ear diameter，and yield per plant，while it was negatively correlated with plant height，ear height，and barren tip length. Significant differences （ p< 0.01 ） were observed in average yield，plant height，ear height，ear length，kernels per row，and thousand-kernel weight acrossplanting densities.Incontrast，the diferences inbarren tiplength，ear diameter，and numberof rows per ear were not statistically significant.

Key words：Planting density；Luoyul14 ; Yield;Agronomic traits

玉米作为重要的粮食和饲料作物，其种植区域已遍布全球多个地区[1]，也是我国第一大粮食作物，在粮食生产中占重要地位。（剩余5040字）