摘要： 通过播种期试验，研究了不同生态条件对高淀粉玉米品种郑单21的生长发育和产量的影响。结果表明，在河南夏播条件下，随着播种期的推迟，郑单21的产量逐渐下降，穗行数、行粒数、千粒重逐渐降低，叶面积系数最大值、干物质积累量逐渐减小，生育进程加快，但6月15日以前播种差异不大；适宜生态条件为：全生育期积温2 596.2~2764.5℃，至2307.7℃产量严重下降；全生育期日均温度为23.2~24.0℃，至22.6℃产量严重下降；全生育期光照514.9~603.2h，至425.3h产量严重下降；全生育期日均光照为4.6~5.3h；至4.3h产量严重下降。

关键词: 玉米, 生长发育, 产量, 生态条件

Abstract: Sowing-date experiment of corn variety Zhengdan 21 at Anyang City,the influence of different ecological conditions on growth and yield was studied.The yield,ear row number,and row grain number dropped,the maximum leaf area index and dry matter accumulation declined,the growing process quickened,along with the postponement of summer sowing,The ecological adaptability for high yield of Zhengdan 21 was that whole growing accumulated temperature was 2 596.2-2 764.5℃and whole growing daily mean temperature was 23.2-24.0℃,whole growing accumulated sunshine hour was 514.9-603.2h and whole growing daily mean sunshine hour was 4.6-5.3h.

Key words: Corn, Growth, Yield, Eco1ogical condition

中图分类号: 

• S513.01