52個(gè)青貯玉米組合一年多點(diǎn)試驗(yàn)分析

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中圖分類號(hào)：S326 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：0488-5368（2025）04-0024-06

Abstract：To explore the relationship between maize yield and agronomic traits，a multi-site variety experiment was conducted overone growing season，with 52 silage maize combinations planted in Tangshan，Chengde， Pingquan，and Zhangjiakou.The results showed that，based on a comprehensive assessment of yield potential and stability，six combinations were rated asexcelent.Among them，combination V38 exhibited the highest yield effectvalue（1.O372），while combination V29 demonstrated the lowest yield variability across locations （3.7812）. Correlation analysis and stepwise linear regression analysis of agronomic traits indicated that ear height had adirect negative efect on yield，whereas rust resistance exhibited apositive effect.Together，these two factors accounted for 14 % of the total yield variation. Based on a Euclidean distance of 13.6，cluster analysis of yield and its influencing factors classified the maize combinations into six distinct groups.

Key words：Silage maize； Agronomic characters ； Cluster analysis

玉米是我國(guó)第一大糧食作物，其籽粒、果穗和莖稈在工業(yè)與畜牧業(yè)中有廣泛用途[2]，我國(guó)的玉米進(jìn)口量排名世界首位[3]。（剩余4514字）