Properties of cation exchange capacity in the soils of Vojvodina [Serbia]: [Master thesis]
2007
Laslo, A.
In order to study CEC (cation exchange capacity), 210 samples were taken of the most common soil types of the Province of Vojvodina (Serbia): arenosol, chernozem, eutric cambisol, solod, fluvisol, humogley and solonetz. As clay minerals and organic matter in the soil are main carriers of cation adsorption, besides the CEC value, the relative content of organic matter, clay and silt fractions in CEC was also calculated. With some soil types (arenosol, solonetz) the influence of ameliorative measures was also investigated (application of phosphogypsum, peat and organic matter) and the influence of the farming systems (with chernozem) on CEC. The results indicate that CEC is most affected by clay fraction content and therefore the highest CEC value was found in humogley and the lowest in arenosol. The relative content of clay fraction for the soils in Vojvodina is 66.19%, silt 8.49% and organic matter 24.63%. Correlation coefficients between clay content and CEC (r=0.76) and silt and CEC (r=0.48) are statistically highly significant, whereas the correlation between organic matter content and CEC is positive and low (r=0.13). Apllying peat and phosphogypsum with arenosol caused a 7.09 cmol/kg increase in CEC value. Ameliorating fertilization of solonetz by phosphogypsum did not affect CEC, whereas the application of organic waste material resulted in a 5.81 cmol/kg decrease of CEC. The application of manure did not affect CEC but the differences in CEC values in organic and conventional farming system are statistically highly significant.
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