Plant Soil Environ., 2002, 48(9):389-396 | DOI: 10.17221/4385-PSE

Seasonal variability in soil N mineralization and nitrification as influenced by N fertilization

S. Malý, B. Šarapatka, M. Kršková
1 Central Institute for Supervising and Testing in Agriculture, Brno, Czech Republic
2 Faculty of Science, Palacký University, Olomouc, Czech Republic

Parameters characterizing N mineralization and nitrification were measured in soils of ten monitoring areas of the basal soil monitoring carried out by the Central Institute for Supervising and Testing in Agriculture. A remarkable seasonal cycle was found only for nitrate concentrations that reached their maxima in the spring (April-June), and late summer and/or autumn, starting in August. Ammonium ions were nitrified immediately after fertilizer application. Anaerobic N mineralization represented a variable parameter, which was not directly affected by mineral N fertilizers. Nitrification measured by means of one-week incubation was significantly stimulated by N fertilizers confirming that substrate availability was a limiting factor of this process. Short-term nitrification activity (SNA) showed no remarkable seasonal fluctuations, which meant that the potential nitrification rate remained relatively constant during the season. Urease activity was mostly constant during the year and was only slightly related to N mineralization.

Keywords: soil; N mineralization; nitrification; N fertilizers; seasonal variability

Published: September 30, 2002  Show citation

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Malý S, Šarapatka B, Kršková M. Seasonal variability in soil N mineralization and nitrification as influenced by N fertilization. Plant Soil Environ. 2002;48(9):389-396. doi: 10.17221/4385-PSE.
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