| Abstract | Cilj istraživanja bio je utvrditi osnovna kemijska svojstva i sadržaj potencijalno
toksičnih elemenata (PTE) u tlima maslinika, te procijeniti onečišćenje tala. Terenski
dio istraživanja proveden je na području Kaštelanskog zaljeva u 30 maslinika. Na
svakoj lokaciji uzet je prosječni uzorak površinskog horizonta (0-30 cm)
antropogenog tla razvijenog na flišu. U prosječnim uzorcima antropogenih tala
maslinika na istraživanom području analizirane su sljedeće fizikalne i kemijske
značajke tla: mehanički sastav tla, reakcija tla, sadržaj ukupnih karbonata, aktivnog
vapna, humusa, fiziološki aktivnih fosfora i kalija te ukupne koncentracije PTE.
Istraživana tla su praškasto-ilovaste teksturne oznake. U svih 30 uzoraka tlo je
alkalne reakcije u rasponu od 7,17 do 7,72 u 1M KCl-u. Tla su jako karbonatna (31,6
– 65,9 %) s visokim sadržajem aktivnog vapna (14,0 – 25,0 %). Utvrđene količine
humusa od 1,55 do 3,65 % analizirana tla čine slabo humoznim. Prisutna je vrlo
slaba opskrbljenost fiziološki aktivnim fosforom, u rasponu od 0,29 do 13,40 mg
P2O5/100 g tla, te dobra opskrbljenost kalijem, u nešto širem rasponu od 8,4 do 66,0
mg K2O/100 g tla. Koncentracije arsena, bakra, olova i cinka (maksimalnih vrijednosti
8,8; 107,1; 27,0 i 95,7 mg/kg) ne prelaze njihove maksimalno dozvoljene
koncentracije u niti jednom uzorku, dok je onečišćenje niklom i kromom prisutno u
53,33 % uzoraka za nikal, te u 86,67 % uzoraka za krom. Dobiveni rezultati
posljedica su kombiniranog utjecaja heterogenosti fliša i različitih antropogenih
utjecaja (obrada, gnojidba, zaštita bilja). |
| Abstract (english) | The research aimed to determine the basic chemical properties and the content of
potentially toxic elements (PTE) in olive grove soils and to evaluate soil pollution. The
field part of the research was conducted in the Kaštela Bay area in 30 olive groves.
At each location an average sample of the surface horizon (0-30 cm) of
anthropogenic soil on flysch was taken. The following physical and chemical soil
characteristics were analyzed in average samples of anthropogenic olive grove soils
in the research area: the particle size distribution of the soil, soil reaction, the content
of total carbonates, active lime, humus, physiologically active phosphorus and
potassium, and total concentrations of PTE. The studied soils have a silty-clay
texture. In all 30 samples, the soil has an alkaline reaction from 7.17 to 7.72 in 1M
KCl. The soils are highly calcareous (31.6 – 65.9%) with a high content of active lime
(14.0 – 25.0%). The established humus content was low (1.55 to 3.65%). There is a
very weak stock of physiologically active phosphorus, ranging from 0.29 to 13.40 mg
P2O5/100 g of soil, and a good stock of potassium, in a wide range of 8.4 to 66.0 mg
K2O/100 g of soil. The concentrations of As, Cu, Pb and Zn (maximum values of 8.8,
107.1, 27.0 and 95.7 mg/kg, respectively) do not exceed their maximum permissible
concentrations in any sample, while Ni and Cr contamination is present in 53.33%
and 86.67% of samples, respectively. Research results are mostly the result of flysch
as heterogeneous parent material and various anthropogenic influences (tillage,
fertilization, plant protection). |
