Content of zinc and lead in a calcareous chernozem soil after long-term fertilization

Abstract

The purpose of this investigation was to determine the effect of long-term application of mineral and organic fertilizers (farmyard manure and cornstalks) on the content of zinc and lead in a calcareous chernozem soil. For this purpose soil samples were taken from an experimental field of the Maize Research Institute in Belgrade. Total and available (DTPA-extractable) zinc and lead were determined by atomic absorption spectrophotometry, after necessary preparations of soil samples for the analysis. Total zinc content did not change significantly under the influence of applied fertilizers. However, the content of available zinc increased significantly in the experimental variants where organic fertilizers had been applied. It was found that fertilization did not have significant effect on the content of total and DTPA-extractable lead.

Cilj ovoga rada je bio utvrđivanje uticaja višegodišnje primene mineralnih i organskih đubriva (stajnjak i kukuruzovina) na sadržaj cinka i olova u karbonatnom černozemu. U tu svrhu uzeti su uzorci zemljišta sa jednog poljskog ogleda Instituta za kukuruz u Zemun Polju. Sadržaji ukupnog i pristupačnog cinka i olova su određeni metodom atomske apsorpcione spektrofotometrije posle odgovarajuće pripreme zemljišnog materijala za analizu. Sadržaj ukupnog cinka se nije značajno promenio pod uticajem primenjenih đubriva. Međutim, sadržaj pristupačnog cinka se značajno povećao u svim varijantama ogleda gde je primenjeno stajsko đubrivo. Inače, ovo povećanje pristupačnog cinka se uočava do dubine od 80 cm. Utvrđeno je da višegodišnja primena đubriva nije imala značajnog uticaja na sadržaj ukupnog i pristupačnog olova.