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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(37 500、52 500、67 500、82 500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穗高系数逐渐增加,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。
Six different types of maize varieties, Crane, Jidan 101, Zhongdan 2, Yedan 13, Zhengdan 958 and Xiangyu 335 were used to compare the effects of different maize varieties under different densities (37 500, 52 500, 67 500, 82 500 / hm2) lodging resistance. The results showed that the lodging rates of different maize varieties showed great difference, and the modern varieties were significantly lower than the early varieties. With the increase of planting density, the lodging rate and ear height coefficient of all maize varieties increased gradually, Broken strength gradually decreased. However, the difference of lodging resistance index among different varieties is far greater than that of planting density. Studies have shown that although the increase of planting density will have a certain impact on the anti-down performance, but the lodging itself is the key to improve the lodging resistance.