Naslov
Response of dehydrogenase activity to increased soil salinity and cadmium concentration in relation to metal chemical speciation

Autori
Filipović, Lana ; Romić, Marija ; Sikora, Sanja ; Huić Babić, Katarina ; Filipović, Vilim ; Romić, Davor

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

Izvornik
Book of Abstracts of the 13th Congress of the Croatian Society of Soil Science "Utilizing potential of soil and land resources: Key roles of science and effective policy" / Romić, Marija ; Rastija, Domagoj ; Popović, Brigita - Osijek : Studio HS internet, 2018, 31-31

ISBN
978-953-7878-85-6

Skup
13th Congress of the Croatian Society of Soil Science: Utilizing potential of soil and land resources: Key roles of science and effective policy

Mjesto i datum
Osijek, Hrvatska, 10.09.2018. - 14.09.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
soil microbial activity ; soil contamination ; Cd complexation ; Cd bioavailability

Sažetak
Coastal alluvial soils are frequently under saline conditions and, because of the sediment deposition along the river estuaries, may become a sink for spectra of contaminants. Dehydrogenase activity (DHA) responds rapidly even to small changes in soil physico-chemical properties and it is used as an indicator of overall soil microbial activity. Despite the fact that metal species in the soil solution will determine its toxicity in the environment, studies on soil DHA which include metal speciation are scarce. Therefore, the present study aimed to reveal the effects of increased soil (NaCl) salinity and cadmium (Cd) concentration (total and available) on DHA, with a special interest in the effect of major Cd species in the soil solution on DHA. In a greenhouse pot experiment, NaCl salinity (50 and 100 mM) was applied to control soil and soil spiked with Cd (5 and 10 mg kg-1). This study confirmed that increased soil salinity, as well as Cd contamination may suppress DHA, but in both cases without the difference between the treatments. Although correlations between DHA and Cd species in the soil solutions were not very strong, data still suggest the possibility that different Cd species in the soil solution may have a different effect on DHA, e.g. that CdCln2-n complexes may have a higher inhibitory effect on DHA than other Cd species. Also, DHA could possibly increase the proportion of organically complexed Cd by dehydrogenating organic compounds present in the soil solution.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA