选用掖单4号、掖单12两个品种为试材,通过连续两年进行夏玉米最佳收获期试验和灌浆速度测定。结果表明,在我市自然条件下,以吐丝后52～55天收获产量最高,比传统苞叶发黄时收获晚收6～9天,增产11.1％～20.2％,并建立两品种回归模型,找出最佳收获期及与积温、含水量关系。 Yedan 4 and Yedan 12 were selected as test materials, and the optimum harvesting period and filling speed of summer maize were determined by two consecutive years. The results showed that under the natural conditions of our city, the yield was highest after 52 ~ 55 days after silking, 6 ~ 9 days later than the traditional yellow husk when yielding, yielding 11.1% ~ 20.2%, and establishing the regression model of two varieties , To find the best harvest and with the temperature, water content.