Simulating future climate scenarios : the effect on nitrogen utilization in organic fertilizers on carrot crops

Abstract

The agricultural industry's impact on biodiversity loss and greenhouse gas emissions necessitates addressing the use of nitrogen (N) in agroecosystems. This study explores the role of organic fertilizers, such as manure, animal slurry, and food waste, in sustainable agriculture. The model DeNitrification DeComposition (DNDC) was utilized to simulate the effects of future climate conditions on N mineralization and plant growth in carrot crops by considering temperature, precipitation, and CO2 levels forecasted for 2050. The focus was on maximizing crop N uptake and minimizing N losses to the environment. Although the model validation was inconclusive, the results indicate that increased N mineralization in organic fertilizers may not meet the growing plant N demand in a warmer climate. Moreover, higher temperatures and CO2 levels affect plant N uptake and growth patterns, suggesting the need for dynamic fertilizer recommendations. The study also highlights the potential benefits of combining organic fertilizers, such as digestate, with other sources to optimize nutrient availability and waste recycling. However, further field trials are necessary to validate these findings and ensure their practical application. The research underscores the importance of adjusting fertilizer management practices to mitigate the impacts of climate change and enhance N utilization in organic farming systems.