Sadržaj teških metala u zemljištu u zavisnosti od sistema đubrenja kukuruza / Heavy metals content in soil depending on the system of maize fertilization
2015
Milić, Stanko (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija)) | Žarković, Branka (Poljoprivredni fakultet, Beograd-Zemun (Srbija)) | Ninkov, Jordana (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija)) | Radovanović, Vesna (Poljoprivredni fakultet, Beograd-Zemun (Srbija)) | Vasin, Jovica (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija))
For the purpose of testing heavy metal content as a result of fertilization, 324 soil samples were analysed within a multi-annual trial of different maize breeding systems. Soil samples were taken from 3 soil depths: 0-20, 20-40, and 40-60 cm. Collected samples were analysed for the pseudo total content of: As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn. Content of the chemical elements found in the analysed samples did not exceed the maximum allowable concentration (M.A.C.) prescribed for agricultural soils. At 0-20 cm soil depth, the tested treatments had a lower content of several elements except Cu compared to control, with an observed statistically significant difference (in 18 cases). The distribution of metals is a result of the long-term removal of chemical elements through yield. This is particularly expressed in the content of Zn, due to high Zn requirements of maize. The majority of observed elements were evenly distributed across the soil horizon. Differences between the first and second depth were not prominent, while the third depth (40-60 cm) had significantly lower content of the chemical elements, which is in coherence with the distribution of microelements and heavy metals in non-polluted soils. Soil horizon exhibited a statistically significant difference in the copper content, which was higher after one treatment with manure. This could have been caused by the use of copper as a feed additive. Cadmium content was below the limit of detection within the method of 0.5 mg kg-1 applied for the whole research, proving that long-term application of fertilizers did not cause soil pollution by this element.
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