Effect of mixed planting of Avena sativa–bean grass on grassland performance

The aim of this study was to explore the yield-increasing effect of the mixed sowing combination of Avena sativa–bean grass on yield and quality. The experiment used a single-factor random zone group design to explore the effects of mixed planting of Avena sativa, Vicia villosa Roth, Vicia sativa, and Vicia villosa. on the agronomic traits and nutritional quality of pastures under drip irrigation in arid areas. Additionally, principal component analysis (PCA) was used to comprehensively evaluate the best mixed sowing combination of oat crops and three legumes. The results showed that all mixed sowing combinations had an impact on forage production performance. The mixed sowing hay yield of Avena sativa and Vicia villosa  Roth was the highest, reaching 9 490.67 kg·ha⁻¹. The relative feeding value of mixed forage combined with Avena sativa and Vicia sativa is 108.61, which is only lower than that of legume forage mono-sowing. The results calculated by principal component analysis (PCA) showed that the mixed planting of Avena sativa and Vicia villosa  Roth had the best production performance, and could be popularized and applied in arid areas.