Naslov
Cadmium and lead in the system drained soil - plant - water in the Drava and Danube catchment area

Autori
Čoga, Lepomir ; Vidaček, Željko ; Poljak, Milan ; Kovačević, Vlado

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Summaries, Vol. I / Pedro, G. ; Ruellan, A. - Montpellier : ISSS ; AFES, 1998, 113-113

Skup
16th World Congress of Soil Science

Mjesto i datum
Montpellier, Francuska, 20.08.1998. - 26.08.1998

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
cadmium; lead; leaching; removal; drainage; water; Danube

Sažetak
The dynamics of cadmium and lead was investigated in drained gley soil (Gleysols, FAO 1990) with three variants of drain spacing, 10, 20 and 40 m, respectively, in wheat, and in drain and ground watr, at standard agrotechnical practice. The total cadmium and lead content in soil was determined by digestion with King water (HNO3=1:3) according to Black et al. 1965, and the concentration of exchangeable cadmium and lead was determined by extraction with (EDTA)Na2 - AAAC (Lakman and Ervio, 1971). Cadmium and lead in plant material were determined by wet incineration in mixture of HNO3/HF/HClO4 (Neil, McQuader et al., 1979). Concentration of cadmium and lead in water was determined by the method of atomic absorption spectrophotometry after complexing of metals in water with amonium-pyrolydine-dithiocarbamate (APDC) and extraction of complexes with methyl-isobotyl-ketone (MIBK) according to APHA-AWWA-WPCF, 1992. The total cadmium and lead content in soil is uniform and low for threedrain spacings, while the exchangeable cadmium and lead content in soil is the highest at 40 m drain spacing. The highest concentration of cadmium 0.36 mg Cd/kg of dry matter and lead, 0.50 Pb/kg of drymatter in wheat grain was recorded in plants growing on soil with the highest exchangeable cadmiumcontent of 0.27 mg Cd/kg of soil and lead of 4.8 mg Pb/kg of soil. The average cadmium content in drain and ground water was between 1.55 and 4.03 microgram Cd/l, and lead between 32.7 and 63.5 microgram Pb/l, depending ondrain spacing. The highest concentration of cadmium of 5.8 microgram Cd/l and lead of 78.5 microgram Pb/l was recorded in ground water on the variant with drain spacing of 10 m. Although variations in cadmium and lead mobility in drained gley soil have been determined in dependence on drain spacing, even the highest quantities of leached cadmium of 1.1 g/ha and lead of 18.9 g/ha show clearly enough that detailed drainage system, in controlled agrotechnical practice, do not have a major impact on ecological balance.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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