Recycling-Derived Fertilisers for Lettuce Growth: Pot Trial

Lettuce growth trial assessing residual digestate fertilisers (RDFs) as sustainable nitrogen sources compared to synthetic fertilisers (CAN, TSP, potassium sulfate). Conducted in 54 pots with two N dosages (100% and -50% of Inagro recommendations) under controlled conditions. Soil from Wingene, Belgium (Z.c.h. type, sandy, poorly drained) was analysed for pH, EC, organic matter, nutrients, and heavy metals. Lettuce (*Lactuca sativa* L. cv. Cosmopolia) grown for 55 days at 20°C with 12-hour artificial light (2000 lux), maintained at 60% field capacity. Fresh and dry weight, nutrient uptake, and heavy metal content were measured. Part of the ReNu2Farm project (Interreg North-West Europe).