Dynamics of inorganic forms of nitrogen in soil of the Nature Reserve Žitavský luh
2005
Kantor, M.,Slovak University of Agriculture in Nitra (Slovak Republic). Faculty of Agrobiology and Food Resources. Department of Environmental Sciences and Zoology | Ondrišík, P.,Slovak University of Agriculture in Nitra (Slovak Republic). Faculty of Agrobiology and Food Resources. Department of Environmental Sciences and Zoology
The soils of the Nature Reserve Žitavský luh were sampled over the years 2003 and 2004, and the dynamics of their inorganic nitrogen forms was evaluated. Changes in inorganic nitrogen forms were observed in connection with several variables as the sampling depth, soil moisture content, soil pH value and others. The higher contents of both nitrogen forms - nitrate and ammonium nitrogen were determined in the first year (2003). The contents of nitrate nitrogen in this year ranged between 1.18-9.76 mg per kg with the average of 3.62 mg per kg of soil. The average content of ammonium nitrogen was 5.78 mg per kg. The lower contents of both nitrogen forms were determined in the second year (2004). The nitrate nitrogen achieved an average content of 2.42 mg per kg (0.85-8.57 mg per kg) and the average content of ammonium nitrogen was 4.44 mg per kg (3.24-6.85 mg per kg). From all the statistical indicators, the year and sampling depth had statistically high significant effects, and the sampling date had a statistically significant effect on the contents of nitrate nitrogen. The year and to a certain extent also the sampling site had statistically high significant effects on the contents of ammonium nitrogen. The depth had a statistically significant effect on the contents of ammonium nitrogen. Statistically significant positive correlation was only found between the nitrate and ammonium nitrogen. No correlation was found between the nitrate nitrogen and moisture content and pH value of soil. The same was situation concerning the examined correlations in case of ammonium nitrogen. The presented work was accomplished within the grant project VEGA 1/0196/03.
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