Mapa dotacji

For millennia, nutrient supply in agriculture depended on natural processes like soil weathering and biological nitrogen fixation, as well as the internal recycling of nutrients with organic residuals as organic fertilizers. However, with the increasing dependence of modern society and agriculture on fossil energy, agricultural productivity has become dependent on continued external nutrient inputs. High inputs of synthetic fertilizers meant that the internal recycling of nutrients in agroecosystems has become more and more irrelevant in sustaining yields. Inappropriate and excessive use of fertilizers causes their accumulation in the soil, which leads to their degradation. Accidental loss of nutrients from nitrogen fertilizers results in elevated amounts of greenhouse gases, such as N2O emissions, groundwater pollution, and eutrophication of surface waters. The “circular bioeconomy” is extensively discussed in science and policy, and its implementation in practice is considered a panacea for fixing many current sustainability problems. An essential part of the latest growth strategy (e.g., the European Green Deal) is the circular economy model, which focuses on resource efficiency and includes the management of biomaterial and waste. Under climate change, eutrophication and soil degradation conditions, the Baltic Sea region is facing the challenge of recovering and obtaining nutrients. The Baltic Sea coastal area is rich in biomass resources (algae, macrophytes, mussel shells, beach wrack), which can be used in agriculture for sustainable food production. One of the possibilities consistent with the circular economy is the use of marine biomass resources as both a fertilizer and an adsorbent for nutrient recovery. These solutions will prevent nutrients from dispersing into the environment and becoming pollutants. This biomass can be used to force dune succession since this vegetation is limited by nutrient availability. Cycling nutrients can therefore improve biodi