中文摘要：

以6个不同类型玉米品种——白鹤、吉单101、中单2号、掖单13、郑单958和先玉335为材料，比较了不同玉米品种在不同密度下（37500、52500、67500、82500株／hm2）的抗倒性能。结果表明：不同玉米品种间的倒伏率表现出很大差异，近现代品种显著低于早期品种；随着种植密度的增加，所有玉米品种倒伏率和稳高系数逐渐增加，茎秆穿刺强度和压碎强度逐渐降低。但不同品种间抗倒性能指标的差异远大于种植密度的处理。研究显示，虽然种植密度的提高会对抗倒性能有一定的影响，但品种本身的抗倒特性才是提高抗倒伏的关键。

英文摘要：

The experiment was conducted at Gongzhuling experimental station of Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, during 2010 -2011. The indexes relating to lodging resistance performance of six maize varieties（ Baihe, Jidanl01, Zhongdan2, Yedanl3, Xianyu335 and Zhengdan958 ） were measured under differ- ent planting densities（37 500,52 500,67 500 and 82 500 plants/hm2）. The results indicated that lodging rate among maize varieties showed ones ; The lodging-resistance characteristics. Maize a significant difference and modem maize varieties were significantly lower than early performance of different maize varieties had significant difference because of the maize lodging rate and the ear height coefficient increased with the increasing of planting density, and the puncture strength and crush strength gradually reduced. Although the lodging resistance performance was af- fected by the plant density to some extent, increasing the variety own characters was the key for lodging resistance.