玉米在粮食生产中占有极为重要的地位。为进一步研究玉米品种(系)的适应性，筛选出适应大面积种植的玉米品种(系)，在90 000株/hm2的种植密度下，运用聚类分析、相关性分析等方法对13个玉米品种(系)的农艺性状及产量构成要素进行了分析。结果表明，甘肃农业大学应用技术学院正在选育研究中的玉米品种T7穗叶夹角和叶面积低于平均值19.24%、3.93%，表现株型紧凑。T7、T6的产量高于平均值8.25%、7.85%，这2个品种(系)群体增产效果明显，可在该区域作为主导玉米品种种植。

Maize occupies a crucial position in grain production. To further study the adaptability of maize varieties (lines) and to screen maize varieties(lines) suitable for large-scale planting, under the planting density of 90 000 plant/ha, cluster analysis and correlation analysis were applied to analyze the agronomic traits and yield components of 13 maize varieties(lines). Results showed that ear leaf angle and leaf area in T7, which is carrently under the breeding progress of College of Applied Technology, Gansu Agricrltural University, were 19.24% and 3.93% lowed compared with the mean values, respectively, indicating a compact plant type. Yield data in T7 and T6 were 8.25% and 7.85% higher compared with the mean values, respectively indicating significant increases in yield, which are regarded as the suitable varieties (lines) in this area.

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