Parallel Session D – University of Copenhagen

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Parallel Session D

Raghunath Subedi; University of Turin, ReUseWaste: Crop nutrient value and greenhouse gas emissions from biochar based biofertilizers

Athanasios Pantelopoulos; UCPH; ReUseWaste: Gross and Net nitrogen mineralization rates in soil amended with treated solid digestate

André Santos; CEBAS-CSIC; ReUseWaste: Fertilising capacity and NO3 leaching risk of composts produced from the solid fraction of pig slurry

Ivona Sigurnjak, Ghent, INEMAD: Fertilizer performance of liquid fraction of digestate as bio-based nitrogen fertilizer

Rapporteurs report

Raghunath Subedi, ReUseWaste: Crop nutrient value and greenhouse gas emissions from biochar based fertilizers: 

  • N content and volatile matter are important biochar properties.
  • Wood biochar: showed higher C sequestration potential.
  • Matching the right biochar properties (as N content and Total Solids) for a given soil type is important for a correct agronomic use.

Athanasios Pantelopoulos, ReUseWaste: Gross and Net nitrogen mineralization rates in soil amended with treated solid digestate:

  • Drying and acidification enhace net N mineralization
  • Acidification inhibits N nitrification
  • Acidification decreases Carbon mineralization
  • Acidification and drying are an interesting option for digestate solid treatment

3. André Santos, ReUseWaste: Fertilizing capacity and NO3 leaching risk of compost produced from the solid fractions of pig slurry.

  • Compost based fertilizer could be seen to replace the mineral fertilizer.
  • Cu and Zn concentrations did not cause a toxic effect to plants.
  • Good agricultural practices as composting can reduce nitrate leaching.

4. Ivona Sigurnjak, Inemad: Fertilizer performance of liquid fraction of digestate as bio-based nitrogen fertilizer.

  • Liquid fraction of digestate could substitute synthetic NK fertilizer and result in a significant economic and ecological benefit.
  • Special attention should be given to its nutrient composition.

Compiled by Daniel Meyer-Kohlstock and Iria Regueiro

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