Vzťah medzi kadmiom a úrodotvornými formami dusíka ovplyvnenými kompostom pod cukrovou repou.

In terms of the potential effects of the natural (geogenic) and anthropogenic agricultural environment on the crop quality, it must be remembered that it is necessary to maintain an uncontaminated environment with high soil production potential. The objective of this research was to analyse and evaluate soil under sugar beet, the compost produced and the soil affected by the addition of compost, in order to determine the Cd, NO₃^--N, NH₄⁺-N contents in topsoil and soil with added compost (1:1 ratio), to evaluate the statistical significance of Cd in relation to the fertile forms of nitrogen, and to find out whether compost influences the monitored parameters. The analyses were carried out using the Atomic Absorption Spectrometry and Colorimetric methods. The obtained results were evaluated statistically using the SAS 9.4 software method and Spearman's correlation coefficient. The results showed that NO₃^--N contents in soil reached 14.73 mg·kg-1, NH₄⁺-N 9.50 mg·kg-1, Nin 23.05 mg·kg-1, Cd 2.96 mg·kg-1, soil + compost (1:1 ratio) NO₃^--N 23.93 mg·kg-1, NH₄⁺-N 26.42 mg·kg-1, Nin 42.63 mg·kg-1, Cd 2.71 mg·kg-1 dry matter. Very high statistical dependence (P < 0.001) was observed for all inorganic fertile forms of nitrogen. High statistical dependence (P < 0.01) was observed for soil Cd to soil NO₃^--N, soil + compost Cd to soil NO₃^--N, soil + compost Cd to soil Nin. Compost had a statistically highly significant effect on Cd in relation to forms of nitrogen, reducing Cd concentration levels and increasing the proportion of inorganic fertile forms of nitrogen. [ABSTRACT FROM AUTHOR]