Pristupačnost mikroelemenata (Pb, Cd, Cu i Zn) u odnosu na svojstva zemljišta pod pašnjacima Stare planine

Abstract

U ovom radu proučavanja su imala za cilj bolje razumevanje veze između svojstava zemljišta i pristupačnosti mikroelemenata u zemljištu pod pašnjacima. Proučavanja su vršena na lokalitetima Stare planine (Babin zub, Javor I, Javor II, i Prelesje) gde je dominantan tip zemljišta kiselo humusno-silikatno zemljište (Dystricleptosol), a na kojima se pojavljuje zajednica Agrostietumvulgaris (capillaris) Z. Pavl. 1955. Na svim lokalitetima zemljište je uzorkovano na fiksnim dubinama: 0-5, 5-10, 10 -20 i 20 - 40 cm. Pseudoukupni (ekstrakt rastvor aquaregia) sadržaji mikroelementa (Pb, Cd, Cu i Zn), kao i pristupačni sadržaji (ekstrakt DTPA helatnog agensa) u zemljištu mereni su AAS. Sadržaji pseudoukupnih mikroelemenata u proučavanom zemljištu su niži ili u granicama za multifunkcionalno korišćenje zemljišta. Utvrđena je veza između sadržaja pristupačnih mikroelemenata u zemljištu i sadržaja pseudoukupnih mikroelemenata, kao i njihova korelacija ovih sadržaja sa svojstvima proučavanih zemljišta.

The research presented in this paper was aimed at better understanding of the relationship between soil properties and the availability of trace elements in pasture soils. The research was conducted in several localities of Stara Planina mountain (Babin zub, Javor I, Javor II and Prelesje), where the dominant soil type is acid humus siliceous soil (Dystric leptosol) characterized by the presence of the Agrostietumvulgaris (capillaris) community Z. Pavl., 1955. In all localities the soil sampling was performed at fixed depths of 0-5, 5-10, 10 -20 and 20 - 40 cm. The pseudo-total contents of trace elements (Pb, Cd, Cu and Zn) (extracted with aqua regia solution), as well as the available contents (extracted with the DTPA chelating agent) in the soil were measured by AAS. The pseudo- total content of trace elements in the soil studied are lower or within the limits for multifunctional land use. A correlation was established between the content of available trace elements in soil and the content of pseudo-total trace elements, as well as between these contents and the properties of the soils studied.