Verminderung der stickstoffauswaschung nach gülledüngung durch einsatz von nitrifikationsihibitoren und kombination mit strohdüngung

Summary Trials in pots and field with inhibitors for nitrification (N-Serve, Dicyandiamid [DCD] and CMP) started in 1976. In effectivity and time of effect of these preparations were no great differences. The effect is determined mainly by temperature. After decrease of the effect of these preparations the population of the nitrificying microorganisms recovers in short time. In the trials an influence on the preparations to the biological activity of soil was not found. The decrease of N-leaching, the use of nitrogen, the instruction to application and technological proceeding of slurry are described. The straw-fertilization reduces the leaching of nitrogen by N-immobilisation at a rate of 0.50–0.75 kg N/100 kg straw.