Effecten van plantaardig digestaat op bodem, emissies en gewasopbrengst: Resultaten van een literatuurstudie, incubatieproef en potproef

Anaerobic digestion of plant-based residues can contribute to renewable energy production and prevent emissions from crop residues and organic waste. In contrary to digestates derived from animal manure, only limited research is available on the effects of digestate from plant-based residues. In this study the effects of plant based digestate on nitrous oxide, ammonia and CO2 emissions, soil fertility and crop yields were investigated, using literature research and an incubation and pot experiment. In the experiments plant based digestates from crop residues, sugar beet residues and sugar beet leaves were compared with regula rfertilizers (mineral fertilizer, cattle slurry, co-digested cattle slurry and compost). The emissions of the plant based digestates were comparable to cattle slurry. Also crop yield and N uptake were comparable to cattle slurry and higher compared to compost. This study concludes that the plant based digestates have no risk on high emissions or negative effects on soil fertility and crop yields.