宽行密植对夏玉米农艺性状和产量的影响

摘要

Under high plant density of 82 500 plants per hectare,the effects of wide-row dense planting (row spacing of 80 cm,plant spacing of 15 cm) on the agronomic characters and yield of summer maize were studied using traditional planting (row spacing of 60 cm,plant spacing of 20 cm) as control.Compared with control,the coefficient of ear height under wide-row dense planting decreased,the lodging resistance strengthened,and plant harvest density,thousand-kernel weight,kernel number per ear and kernel yield obviously increased,the yield increased by 7.9％ ～ 22.0％.Therefore,wide-row dense planting could overcome the contradiction between high plant density and lodging resistance and increase the yield significantly.%在8.25万株/hm2高密度条件下,以传统行株距(行距60 cm、株距20 cm)为对照,探讨了宽行密植(行距80 cm、株距15 cm)对夏玉米农艺性状和产量的影响.结果表明:宽行密植的穗位高系数均比传统行株距种植有所下降,抗倒能力增强,收获密度、千粒重、穗粒数、籽粒产量显著增加,参试品种产量增幅为7.9％～22.0％.因此宽行密植协调了夏玉米高密度种植与抗倒性间的矛盾,增产效果显著.