论文部分内容阅读
以郑单958、丰玉4两个紧凑型品种为试验材料,研究高密度条件下行距配置对夏玉米抗倒能力及产量的影响。结果表明,株高随行距的增大而增加;基部节间茎粗随行距的增大而减小。随行距的缩小,茎秆硬度、抗拉力和抗折力显著增加,有利于提高茎秆抗倒伏能力;通过缩小行距可使产量构成因素实现最佳配置,从而获得较高产量。研究结果表明,高密度条件下河北省夏玉米最佳行距为50 cm。
Two compact varieties, Zhengdan 958 and Fengyu 4, were used as experimental materials to study the effect of row spacing on lodging resistance and yield of summer maize under high density conditions. The results showed that the plant height increased with the increase of distance, and the stem of basal internode decreased with the increase of distance. With the narrowing of the distance, the hardness, tensile strength and bending resistance of the stalk increase significantly, which is beneficial to improve the lodging resistance of the stalk. By narrowing the row spacing, the yield components can be optimally configured to obtain higher yield. The results showed that the best row spacing of summer maize was 50 cm under high density.