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

Plant, Soil and Environment, 2008, vol. 54, issue 11, 463-470

Abstract: 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 (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:54:y:2008:i:11:id:435-pse

DOI: 10.17221/435-PSE

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