Effect of the long-term fertilization on the heavy metal content in a leached chernozem
2000
Fajtondzhiev, L. | V"lev, V. (Institut po Pochvoznanie i Agroekologiya "N. Pushkarov", Sofia (Bulgaria))
Soils (leached chernozem) of Gorni Dabnik in the district of Pleven from long-term (more than 25 years) fertilizing trials are studied. The fertilizing treatments are as follows N0P0K0, N18P14K0 and N24P20K0, where N0, N18 and N24 are respectively 0, 180 and 240 kg N/ha, K0 - 0 kg K2O/ha, P0, P14 and P20 are respectively 0, 140 and 200 kg P2O5/ha. The results obtained and their statistical evaluation do not show an effect of the long-term fertilization on the soil total content of the studied heavy metals and arsenic. The soil total content of the studied elements are as follows in mg/kg: Cu -25-26, Zn -81-83, Pb -26-30, Cr -69-70, Ni -43-44, Co -15, Cd -0,09-0,15, As -8,1-9,0, Mn -832-1000. Fe and Al in % are respectively 3,4-3,7 and 5,1-5,6.
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