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.

Silage maize  /  Gray correlation  /  Monsoon climate of low-latitude plateaus  /  Agronomic traits  /  Yield traits  /  Nutritional quality