Soil health is associated with higher primary productivity across Europe
2024
ROMERO Ferran | LABOUYRIE Maeva | ORGIAZZI Alberto | BALLABIO Cristiano | PANAGOS Panos | JONES Arwyn | TEDERSOO Leho | BAHRAM Mohammad | GUERRA Carlos | EISENHAUER Nico | DONGXUE Tao | DELGADO-BAQUERIZO Manuel | GARCÌA-PALACIOS Pablo | VAN DER HEIJDEN Marcel
Soil health is expected to be of key importance for plant growth and ecosystem functioning. However, whether soil health is linked to primary productivity across environmental gradients and land-use types remains poorly understood. To address this gap, we conducted a pan-European field study including 588 sites from 27 countries to investigate the link between soil health and primary productivity across three major land-use types: woodlands, grasslands and croplands. We found that mean soil health (a composite index based on soil properties, biodiversity and plant disease control) in woodlands was 31.4% higher than in grasslands and 76.1% higher than in croplands. Soil health was positively linked to cropland and grassland productivity at the continental scale, whereas climate best explained woodland productivity. Among microbial diversity indicators, we observed a positive association between the richness of Acidobacteria, Firmicutes and Proteobacteria and primary productivity. Among microbial functional groups, we found that primary productivity in croplands and grasslands was positively related to nitrogen-fixing bacteria and mycorrhizal fungi and negatively related to plant pathogens. Together, our results point to the importance of soil biodiversity and soil health for maintaining primary productivity across contrasting land-use types.
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