Soil & Water Res., 2016, 11(4):228-234 | DOI: 10.17221/46/2015-SWR

Losses of soluble forms of organic carbon in relation to different agro-technical treatment of meadowsOriginal Paper

Irena BURZYŃSKA
Research Laboratory of Environmental Chemistry, Institute of Technology and Life Sciences, Raszyn, Poland

Studies were performed to determine the loss of soluble forms of organic carbon in differently used meadows on mineral soil. In a long-term experiment two variants were distinguished: a productive meadow (N120-AN and N120-CN) and a non-productive one (Kp-AN, Kp-CN, Kz-AN, Kz-CN). Productive meadows were fertilized with 120 kg N/ha/year, 34.9 kg P/ha/year, and 149.4 kg K/ha/year and mown three times a year. Nitrogen fertilization was applied in a form of ammonium nitrate (AN) and calcium nitrate (CN). The only agro-technical measure applied to non-productive meadows was the regular cutting of vegetation and leaving it on the plots (variants: Kp-AN and Kp-CN) or taking it away from the plots (variants: Kz-AN, Kz-CN). Significant positive Pearson's linear correlations were found between pH (in CaCl2) of mineral soil and total organic carbon (TOC) content in the following variants: Kz-AN (r = 0.457**), N120-AN (r = 0.491**), and N120-CN (r = 0.424**) and in all meadows fertilized with AN (r = 0.243**). The obtained linear correlation coefficients between pH and TOC indicate that soil organic carbon may be lost as a result of progressive acidification of the soil. Dissolved organic carbon in the mineral meadow soil increased in the following order: Kp-CN > N120-CN > Kz-CN > N120-AN > Kp-AN > Kz-AN.

Keywords: dissolved organic carbon; meadow experiment; mineral soil; total organic carbon

Published: December 31, 2016  Show citation

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BURZYŃSKA I. Losses of soluble forms of organic carbon in relation to different agro-technical treatment of meadows. Soil & Water Res. 2016;11(4):228-234. doi: 10.17221/46/2015-SWR.
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