高密度条件下行距配置对夏玉米抗倒能力的影响  

Effects of Row Spacing on Lodging-resistance of Summer Maize under High Density

作　　者：张晓丽[1] 边大红[1] 秦建国 杜雄[1] 李军虎 崔彦宏[1] 杜义英 

机构地区：[1]河北农业大学,河北保定071001 [2]国家半干旱农业工程技术研究中心,石家庄050051

出　　处：《玉米科学》2012年第4期118-121,共4页Journal of Maize Sciences

基　　金："十一五"国家科技支撑计划重大项目"国家粮食丰产科技工程"(2006BAD02A08)

摘　　要：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。Zhengdan 958 and Fengyu 4 were used as materials to study the effects of row spacing on lodging-resistance and yield under high density.The results showed that plant height increased and diameter of the fourth internode decreased with increased row spacing.Moreover,puncture intension,bending intension resistance and snapping resistance of stem increased with decreased row spacing,thereby,lodging-resistance was increased.Yield could be increased by reducing row spacing to have an even distribution in yield’s components that could weaken competition.Our finding that 50 cm row spacing was beneficial for maize belt of Hebei.

关 键 词：夏玉米 行距配置 抗倒伏 产量 

分 类 号：S513.04[农业科学—作物学]