Effect of Intercropping Oat (Avena sativa) and Common Vetch (Vicia sativa) on Yield and Nutritional Composition of Hay

作者：Jiaqi Fang, Baowen Zhao, Hao Guan, Donghai Yan, Yingxia Lei, Xiaowei Hu, Qiong Zhou, Youjun Chen, H. F. Wang · 发表于：Agriculture · 年份：2026 · DOI：10.3390/agriculture16080838 · 被引用次数：1 · 研究领域：Agronomic Practices and Intercropping Systems、Agroforestry and silvopastoral systems、Soil Carbon and Nitrogen Dynamics

Substantial tracts of fallow farmland remain unutilized across southwestern China throughout winter and spring. To explore a high-yield planting pattern for utilizing such fallow land, a cereal–legume intercropping experiment was conducted in Chengdu in 2021–2022 and in 2022–2023. This involved five different intercropping ratios of oat (Avena sativa) and common vetch (Vicia sativa) including 100:0, 75:25, 50:50, 25:75, and 0:100 based on seed number per unit area. The relative density, LER (land equivalent ratio), hay yield, nutritional composition and in vitro fermentation characteristics were assessed. The study revealed that the combination of oat and common vetch led to a significant enhancement in the production performance over the monocultures. At the flowering stage, the most balanced interspecific competition was observed at a ratio of 50:50. The ratio of 50:50 had the higher LER in the mixture—from 1.018 to 1.873—which was significantly higher than the other two intercropping ratios in 2021–2022. At the flowing development stage in 2021–2022, the harvesting of mixed crops at the 50:50 ratio resulted in a significant higher crude protein yield, 1454.7 kg/hm2, than the other intercropping ratios. As the growth stage continued, the mixture hay neutral detergent fiber and acid detergent fiber contents increased, while the relative feed value and crude fat content decreased. The soluble sugar content increased with the prolongation of the growth stage and peaked at the ...