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[目的]明确黄淮海区玉米品种的合理群体密度。[方法]以郑单958夏玉米为试材,采用单因素随机区组设计,设群体密度4.5万、6.0万、7.5万和9.0万株/hm24个处理,研究不同群体密度对夏玉米株高、叶面积指数、地上干物重、产量及其构成因素的影响。[结果]在4.5万~9.0万株/hm2群体密度范围内,6.0万株/hm2处理产量最高,表明适宜群体密度为6.0万株/hm2。随着群体密度的增加,叶面积指数增大,地上干物重呈现降低趋势,株高、产量呈现先增后降趋势。[结论]玉米品种群体密度为6.0万株/hm2,可构建较合理的群体结构,获得较高的玉米产量。
[Objective] The research aimed to clarify the reasonable population density of maize varieties in Huang-Huai-Hai area. [Method] With Zhengdan 958 summer maize as test material and single factor randomized block design, population density of 45,000, 60,000, 75,000 and 90,000 plants / hm24 was set up to study the effect of different population density on plant height , Leaf area index, dry matter weight on the ground, yield and its components. [Result] The yield of 60,000 plants / hm2 was the highest in the population density of 45,000 ~ 90,000 plants / hm2, indicating that the suitable population density was 60,000 plants / hm2. With the increase of population density, the leaf area index increased, the dry matter weight on the ground showed a decreasing trend, and the plant height and yield increased first and then decreased. [Conclusion] The population density of maize varieties was 60,000 plants / hm2, which could construct more reasonable population structure and obtain higher maize yield.