农学学报2025，Vol.15Issue(7)：23-27,5.
不同密度条件下施氮量对夏玉米产量的影响
Effect of Nitrogen Application Rate on Summer Maize Yield Under Different Densities
摘要
Abstract
To clarify the interaction effects of planting density and N-fertilization rate of summer maize,the maize varieties'DH605'and'MY73'were used as experimental materials,2 densities(67500 plants/hm2,82500 plants/hm2)and 2 N-fertilization rate(210 kg/hm2,300 kg/hm2)were set to analyze the effects of density and N-fertilization on summer maize yield.The results showed that as the density increased,the effective number of ears increased,and yield increased by 18.0%,while the number of grains per spike and the number of grains per row decreased significantly;increasing N-fertilization rate could reduce the adverse effects of densification on maize plant yield and ear traits.The yield increased by 6.0%,the kernels per ear increased by 2.6%,and the leaf area per plant increased by 6.4%.Density and N-fertilization rate mainly affected the kernels per ear.'MY73'had higher yield,better ear characteristics and leaf area under high-density and high N-fertilization rate conditions.It was found that the adverse effects of maize plant and population competition after increasing planting density could be regulated by appropriate increase of nitrogen fertilizer.Therefore,when the planting density of the two varieties increased to 82500 plants/hm2,the N-fertilization rate of 300 kg/hm2 was more likely to achieve high yield.The study is expected to provide some technical support for the synergistic improvement of summer maize quality and yield in western Henan.关键词
密度/施氮量/产量/夏玉米/豫西地区Key words
density/N-fertilization rate/yield/summer maize/western Henan分类
农业科技引用本文复制引用
孟战赢,王育红,郭党,田文仲,李俊红,李芳,吕军杰..不同密度条件下施氮量对夏玉米产量的影响[J].农学学报,2025,15(7):23-27,5.基金项目
国家现代玉米产业技术体系建设专项"洛阳综合试验站"(CARS-02-69). （CARS-02-69）
