SOS Aquae: Microfiltered digestate for efficient fertigation in maize farming

Fertigation with microfiltered digestate in maize cultivation reduces greenhouse gas emissions by 211 kg CO₂ eq./ha compared to urea-based fertilization, primarily due to lower nitrogen volatilization and emissions from digestate application (724 vs. 947 kg CO₂ eq./ha). The method enhances ammoniacal nitrogen uptake efficiency, supports nutrient circularity, and aligns with EU Green Deal and Farm to Fork Strategy goals. Energy use for digestate treatment is low, and integration with existing irrigation systems is feasible. The study, conducted by Ctpa and Società agricola Leona, demonstrates digestate fertirrigation as a sustainable practice for carbon sequestration and emission reduction in agriculture.