Long-term fertilization and heavy metal content in a grey forest soil
2003
Fajtondzhiev. L. | V"lev, V. (Institut po Pochvoznanie "N. Pushkarov", Sofia (Bulgaria))
Soils (grey forest soil) of Nikolaevo in the district of Pleven from long-term (more then 25 years) fertilizing trials are studied. The fertilizing treatments are as follows: NoPoKo, N24P14Ko and N24P20Ko, where No and N24 are respectively 0 and 240kg N/ha, Ko-O kg K20/ha, Po,P14 and P20- 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 elements. The soil total content of the studied elements are as follows in mg/kg: Cu -20-21, Zn -57-59, Pb -25-26. Cr -70-75,Ni -34-35, Co -20-21, Cd -0,08-0,10, As -11,5-11,8, Mn -1300-1400. Fe and Al in % are respectively 3,0 and 3,8-4,0.
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