Abstract: The relationship between the biological yield and the related agronomic traits of different silage maize (Zea mays L.) was studied in the dry-hot valley of Jinshajiang River,and the production potential of silage maize was,explored to provide a scientific theoretical basis for screening suitable silage maize varieties for the dry-hot valley. In this study,25 silage maize varieties were collected as research materials,and the productivity potential of different silage maize in the dry-hot valley region of Jinsha River was evaluated by means of grey correlation degree.The results showed that the yield of fresh grass in the top three was ‘Zhengda 808’,‘Yunrui 10’ and ‘Quchen 9’ of 80.46 t·hm^-2,80.34 t·hm^-2and 72.40t·hm^-2,respectively. The yield of hay grass in the top three was ‘Yunrui 10’,‘Dongdan 159’,and ‘Zhengda 808’ of 23.62 t·hm^-2,20.43 t·hm^-2 and 19.79 t·hm^-2,respectively. The relationship between plant height,stem diameter,leaf length,green leaf number and biological yield of ‘Zhengda 808’,‘Yunrui 10’and ‘Quchen 9’was significant or extremely significant. The top three weighted correlation values were 0.7970,0.7764 and 0.7555,respectively. With excellent agronomic characters,strong lodging resistance and collapse resistance,low empty stalk rate,the production potential of ‘Zhengda 808’,‘Yunrui 10’and ‘Quchen 9’ were great for takin as the silage maize in the dry-hot valley region of Jinsha River.

Key words: Silage corn, Agronomic traits, Yield, Grey correlation analysis

摘要： 研究不同品种的青贮玉米（Zea mays L.）在金沙江干热河谷区的生物产量变化与相关农艺性状的关系，发掘青贮玉米品种生产潜能，为筛选适应干热河谷区青贮玉米品种提供科学理论依据。本研究以国内收集的25个青贮玉米品种为研究材料，利用灰色关联度的方法评价了不同品种在金沙江干热河谷区的生产潜力。结果表明，鲜草产量在前3位的是‘正大808’、‘云瑞10号’、‘曲晨9号’，分别为80.46 t·hm^-2，80.34 t·hm^-2和72.40 t·hm^-2；干草产量在前3位的是‘云瑞10号’、‘东单159’、‘正大808’，分别为23.62 t·hm^-2，20.43 t·hm^-2，19.79 t·hm^-2；‘正大808’、‘云瑞10号’和‘曲晨9号’的株高、茎粗、叶长、青叶数等主要农艺性状与生物产量的相关性达到显著或极显著水平，且加权关联度值排名前3位分别为0.7970，0.7764，0.7555。‘正大808’、‘云瑞10号’和‘曲晨9号’农艺性状优良，抗倒伏、倒折能力强，空杆率低，在金沙江干热河谷区作为青贮玉米种植生产潜力大。

关键词: 青贮玉米, 农艺性状, 产量, 灰色关联度分析