Evaluation of production performance and nutritional value of five silage maize varieties in Hexi Irrigation Area

GU Xian; WANG Guodong; XIE Zhijun; PEI Haidong; HE Chungui

doi:10.13557/j.cnki.issn1002-2813.2026.01.025

Abstract：This experiment aimed to screen high-quality silage maize varieties suitable for cultivation in Hexi Irrigation Area.Comparative experiments were conducted on agronomic traits,production performance,and nutritional quality of five introduced varieties,namely Fangyu 36,Haoyu No.2,Jiayu 538,Longdan No.10,and Longdan No.4,in Xincheng Town,Jiayuguan City,Gansu Province.The experiment was conducted using a randomized block design to measure the agronomic traits indexes such as plant height,stem diameter,and leaf area,production performance indexes including fresh grass yield and dry yield,and nutritional quality indexes such as crude protein and crude fiber content.On this basis,correlation analyses among these indexes were performed,and a comprehensive evaluation was carried out using the Technique for Order Preference by Similarity to Ideal Solution(TOPSIS).The results showed that among the tested varieties,Longdan No.4 had the highest plants height(290.35 cm),fresh grass yield(78.16 t/hm2)and dry yield(20.79 t/hm2).Fangyu 36 had the highest crude protein content(9.57％),but the lowest yield.Correlation analysis revealed that dry yield was extremely positively correlated with plant height(P＜0.01),and extremely negatively correlated with crude protein content(P＜0.01).The TOPSIS comprehensive evaluation indicated that Longdan No.4 achieved the highest score(0.705 081 72),outperforming the other varieties.The study shows that Longdan No.4 exhibits the best overall performance in Hexi Irrigation Area and can be promoted and applied as a locally recommended silage maize variety.