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[目的]研究不同栽培密度下玉米化学调控的效果。[方法]以玉米杂交种浚单20和中农大4号为材料,分别研究了在华北、东北地区不同栽培密度下化学调控对玉米产量及产量构成因子和玉米株型的影响。[结果]“玉黄金”可调控玉米株型,使玉米个体的株高、穗位降低,使穗下部节间粗壮,使玉米的抗倒伏能力增强。化控处理辅助栽培可提高玉米的最适栽培密度,较传统栽培条件下提高了0.75万株/hm2左右。[结论]为玉米的高产栽培提供了理论依据。
[Objective] The research aimed to study the chemical regulation of maize under different planting densities. [Method] The maize hybrids Xundan 20 and Zhongnongda 4 were used as materials to study the effects of chemical regulation on the yield components, yield components and maize plant types under different planting densities in North China and Northeast China. [Result] “Jade Gold ” could regulate the plant type of maize so that the plant height and ear position of maize were reduced, making the lower internodes stout and enhancing the lodging resistance of maize. Chemical control of auxiliary cultivation can increase the optimum planting density of maize, raising about 0.75 million plants / hm2 under the traditional cultivation conditions. [Conclusion] This provided the theoretical basis for high yielding cultivation of maize.