Abstract: This study seeks to identify high-yield and high-quality silage maize varieties that are well-suited to the low-latitude plateau monsoon climate. The objective was to mitigate the imbalance between forage supply and livestock demand on the Yunnan-Guizhou Plateau， support the implementation of the ‘grain-to-feed’ policy， and ultimately to promote the sustainable development of regional grassland animal husbandry. This study analyzed 11 silage maize varieties based on their agronomic traits， yield， and nutritional composition， and conducted a comprehensive evaluation using the grey relational analysis method. The results indicated that ‘Heyu36’ had the highest dry weight per plant at 0.37 kg， followed by ‘Jingke932’ at 0.33 kg. ‘Quchen513’ achieved the highest fresh biomass of 187.7 t·hm^-2. ‘Xikang18’ contained the highest crude protein content at 8.11%， while ‘Quchen513’ exhibited the lowest neutral detergent fiber and acid detergent fiber contents at 40.88% and 17.47%， respectively， resulting in the highest relative feed value of 171.52. Grey relational analysis revealed that ‘Quchen513’ had the highest comprehensive evaluation score with a weighted relational degree of 0.5668， followed by ‘Datian1416’ at 0.5482 and ‘Heyu36’ at 0.5382. In summary， ‘Quchen513’， ‘Datian1416’， and ‘Heyu36’ demonstrated outstanding performance in terms of fresh grass yield， dry matter yield， crude protein content， and stay-green characteristics， making them suitable for widespread cultivation in low-latitude plateau monsoon regions.

Key words: Silage maize, Gray correlation, Monsoon climate of low-latitude plateaus, Agronomic traits, Yield traits, Nutritional quality

摘要： 为筛选适应低纬高原季风气候的高产优质青贮玉米（Zea mays L.）品种，缓解云贵高原草畜矛盾、支撑“粮改饲”政策落实，进而推动区域草牧业可持续发展，本研究以11个青贮玉米品种为试验材料，对其农艺性状、产量及营养成分等指标进行分析，采用灰色关联度分析法进行综合评价。结果表明：单株干重以‘和玉36’最高，达0.37 kg，‘京科932’次之为0.33 kg；‘曲辰513’鲜草产量最高为187.7 t·hm^-2；‘西抗18’粗蛋白含量最高为8.11%，‘曲辰513’的中性洗涤纤维和酸性洗涤纤维含量最低，分别为40.88%和17.47%，其相对饲喂价值最高为171.52。灰色关联度分析显示，‘曲辰513’综合评分最高加权关联度0.5668，其次‘大天1416’为0.5482，‘和玉36’为0.5382。综上，‘曲辰513’‘大天1416’和‘和玉36’在鲜草产量、干物质产量、粗蛋白含量及持绿性等方面表现突出，适宜在低纬高原季风区进行推广种植。

关键词: 青贮玉米, 灰色关联度, 低纬高原季风气候, 农艺性状, 产量性状, 营养品质