Plant Soil Environ., 2008, 54(11):463-470 | DOI: 10.17221/435-PSE

The changes of soil nitrogen and carbon contents in a long-term field experiment under different systems of nitrogen fertilization

V. Nedvěd, J. Balík, J. Černý, M. Kulhánek, M. Balíková
Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czech Republic

Content of N and C in soil were investigated in a long-term field experiment under different systems of N fertilization. Chernozem and Cambisol were extracted using hot water (Nhws, Chws) and 0.01M CaCl2 (NCaCl2, CDOC). The Ct/Nt ratio in Chernozem was 9.6:1 and in Cambisol 6.1:1. The lowest Ct/Nt ratio in both experiments was found in the control treatment. Results showed that C and N compounds are less stable in Cambisol, which leads to a higher rate of mineralization. In the Chernozem, Nhws formed 3.66% from the total N content in the soil whereas NCaCl2 formed only 0.82%. Chws formed 2.98% and CDOC 0.34% from total C content. Cambisol contains 4.81% of Nhws and 0.84% of NCaCl2 from the total N amount and 5.76% of Chws and 0.70% of CDOC from the total C content, respectively. Nitrogen extracted by 0.01M CaCl2 formed only 22.4% of N extractable by hot water in Chernozem and 17.5% in Cambisol. The lowest C/N ratios were obtained after the CaCl2 extraction (3.0-6.2:1). The application of manure increased the content of soil organic N and C compared to the sewage sludge treatments.

Keywords: long-term field experiment; nitrogen; carbon; sewage sludge; farmyard manure; soil organic matter

Published: November 30, 2008  Show citation

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Nedvěd V, Balík J, Černý J, Kulhánek M, Balíková M. The changes of soil nitrogen and carbon contents in a long-term field experiment under different systems of nitrogen fertilization. Plant Soil Environ.. 2008;54(11):463-470. doi: 10.17221/435-PSE.
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