Bordeaux study shows trees boost soil carbon and vine nutrition without cutting grape yields

A 10-year study in Bordeaux vineyards found that planting mature trees alongside grapevines increased soil microbial activity and improved nitrogen uptake without reducing grape yields. The research, posted as a preprint on Research Square, measured how trees recruited soil microbes that enriched soil carbon and nitrogen levels over the decade. The results suggest agroforestry in vineyards can enhance soil health and carbon storage while maintaining production levels. This matters for wine regions looking to sequester carbon without sacrificing harvests. The study was conducted in a temperate vineyard in Bordeaux, France, and is currently awaiting peer review. If confirmed, this approach could give vineyard managers a practical way to improve soil fertility and store more carbon below ground. It also adds evidence that integrating trees into agriculture can support both climate goals and crop output.