Anwendung von organischen Düngern und organischen Reststoffen in der Landwirtschaft

Organic fertilizers and organic wastes contribute significantly to humus reproduction in soil and to plant nutrient recycling. As regards their generation and usage, two opposing trends have appeared over the past few years. On the one hand, there has been a marked regional increase in the volume of organic fertilizers produced and used in agriculture, on the other, the non-agricultural demand for biomass previously used as a humus substitute has risen significantly. This article intends to estimate the national and regional demand for nitrogen, phosphates and potassium as well as for organic carbon for humus substitution and to compare it to the national and regional volume of these substances that arises with organic fertilizers and organic wastes. This includes an assessment of organic fertilizers and organic wastes in terms of their nutrient content and nutrient availability, pollutant content, nutrient and pollutant load and any health risks associated with their use in agriculture. Based on the estimated demand, the available amount and the assessment of risks and benefits, recommendations for use are derived for the agricultural, administrative, political and legislative sectors.