在大田试验条件下,对6种不同种植密度下玉米雌雄穗吐丝散粉进度和产量进行试验研究,结果表明:随种植密度的增大,雌雄穗延迟吐丝散粉,且高峰期重合时间短,不利于花期完成受精作用,穗粒数少,单果穗重,千粒重低,空秆率高,但因有密度优势,收获穗数多,产量反而没有降低。 The results showed that with the increase of planting densities, the male and female delayed spitting powder and the coincidence time was short in the peak period. Under the conditions of field experiment, the progress and yield of the male and female spit powder from six different planting densities were studied. Not conducive to the completion of the flowering period of fertilization, less spikelets, single ear weight, 1000-grain weight, empty stalk rate, but because of density, harvest spike number, but did not reduce the yield.