Content of heavy metals in gleyic chernozem of Srem loess terrace under alfalfa

Abstract

Production of high-quality forage from alfalfa is influenced not only by the presence of nutrients, but also by the absence of harmful elements, such as heavy metals. The examination of the total heavy metals content (Ni, Cr, Pb and As) in gleyic chernozem soil of Srem loess terrace in Hrtkovci, under alfalfa (Medicago sativa L.) were carried out in 2011 in order to determine suitability for the production of safe forage. It total content of Pb, As and Crwas below the maximum permitted concentrations. The content of As, Cr and Ni was higher in the surface layer, unlike Pb, whose content was higher in the deeper layers of soil. A significant positive correlation was found between the total content of Ni, Cr and As. An increased concentration of Ni was found, which was above the maximum permitted concentration. It is necessary to further control its content and accessibility examination and extraction from plants, to prevent its entry into the food chain and provide safe food.

Proizvodnja visokokvalitetne stočne hrane od lucerke uslovljena je ne samo sadržajem hranljivih materija, nego i odsustvom štetnih elemenata, kao što su teški metali. Ispitivanja ukupnog sadržaj teških metala (Ni, Cr, Pb i As) u zemljištu oglejeni černozem sremske lesne terase, na području mesta Hrtkovci, pod usevom lucerke (Medicago sativa L.) izvedena su tokom 2011. radi utvrđivanja pogodnosti za proizvodnju zdravstveno bezbedne stočne hrane. Ukupan sadržaj Pb, As i Cr u ispitivanim uzorcima je bio ispod maksimalno dozvoljene količine. Sadržaj arsena, hroma i nikla bio je veći u površinskom sloju zemljišta, za razliku od olova, čiji je sadržaj bio veći u dubljem sloju. Pozitivna korelaciona veza konstatovana je između ukupnog sadržaja nikla, hroma i arsena. Utvrđen je povećan sadržaj Ni, iznad maksimalno dozvoljene količine. Neophodna je dalja kontrola njegovog sadržaja, kao i ispitivanje pristupačnosti i ekstrakcije od strane biljaka, kako bi se sprečio njegov ulazak u lanac ishrane i obezbedila proizvodnja zdrave hrane.