Humuschemischer Parameter von Boden nach mehrjahriger Kompostanwendung im Feldversuch

The effect of different compost amendments on the structure and composition of soil organic matter was investigated in two long-term field experiments. A combination of wet chemical methods and CPMAS ¹³C NMR spectroscopy was used for the characterization of soil organic matter. Compost amendment significantly increased the level of organic carbon, nitrogen and pH in both soils. Contents of aromatic carbon and lignin were higher in the compost amended plots. The ratio of alkyl to O-alkyl carbon was higher in the control plots and showed a lower extent of decomposition for the compost treatments. Plots with composted cattle manure showed a higher degree of decomposition of cellulose. The differences in the composition of soil organic matter as observed by ¹³C NMR spectroscopy were mainly controlled by the soil type and texture than by the fertilizer or compost amendments.