Abstract
Sulfate complexation of Cd in nutrient solution has been shown to have little impact on Cd uptake by plants. This study examined the effect of sulfate added to soil on Cd concentrations in soil solution and Cd uptake by Swiss chard (Beta vulgaris L. cv. Fordhook Giant). Swiss chard was grown in soil which was wetted with complete nutrient solution containing equivalent salt concentrations of NaNO3 or Na2SO4. Plant growth was reduced by increasing both NO3 and SO4 concentrations in soil solution, with growth reductions similar for both salts. The Cd concentration in soil solution increased P< 0.05) more consistently with increasing concentrations of SO4 compared to NO3 in soil solution. Solution speciation, calculated with GEOCHEM-PC, showed significant increases of Cd2+ activities with increasing salt rates. Shoot Cd content in 19-day-old Swiss chard plants was marginally but significantly P <0.05) increased with increasing SO4 concentration but no effect was observed with increasing NO3 concentration. These results are compared with earlier work on the marked effect of Cl- salinity on Cd availability in Swiss chard. Possible mechanisms explaining the smaller effect of SO4 compared to Cl on Cd availability are proposed.
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Alloway B J, Tills A R and Morgan H 1984 The speciation and availability of cadmium and lead in polluted soils. Trace Subst. Env. Hth. 18, 187–201.
Benjamin M M and Leckie J O 1982 Effects of complexation by Cl, SO4, and S2O3 on adsorption behaviour of Cd on oxide surfaces. Environ. Sci. Technol. 16, 162–170.
Bingham F T, Sposito G and Strong J E 1984 The effect of chloride on the availability of cadmium. J. Environ. Qual. 13, 71–74.
Bingham F T, Sposito G and Strong J E 1986 The effect of sulphate on the availability of cadmium. Soil Sci. 141, 172–177.
Christensen T H 1984 Cadmium soil sorption at low concentrations: I. Effect of time, cadmium load, pH, and calcium. Water Air Soil Pollut. 21, 105–114.
Clayton P M and Tiller K 6 1975 A chemical method for the determination of heavy metal content of soils in environmental studies. CSIRO Australia Division of Soils Technical Paper No. 41.
Garcia-Miragaya J and Page A L 1976 Influence of ionic strength and inorganic complex formation on the sorption of trace amounts of Cd by montmorillonite. Soil Sci. Soc. Am. J. 40, 658–663.
Hendrickson L L and Corey R B 1981 Effect of equilibrium metal concentrations on apparent selectivity coefficients of soil complexes. Soil Sci. 131, 163–171.
Hoins U, Charlet L and Sticher H 1993 Ligand effect on the adsorption of heavy metals: The sulfate-cadmium-goethite case. Water Air Soil Poll. 68, 241–255.
Jurinak J J and Suarez D L 1990 The chemistry of salt-affected soils and waters. In Agricultural Salinity Assessment and Management. Ed. K K Tanji. pp 42–63. Amer. Soc. Civil Eng., New York.
McLaughlin M J, Tiller K G, Beech T A and Smart M K 1994 Soil salinity causes elevated cadmium concentrations in field-grown potato tubers. J. Environ. Qual. 23, 1013–1018.
McLaughlin M J, Maier N A, Freeman K, Tiller K G, Williams C M J and Smart M K 1995 Effect of potassic and phosphatic fertilizer type, phosphatic fertilizer cadmium content, and additions of zinc on cadmium uptake by commercial potato crops. Fert. Res. 40, 63–70.
McLaughlin M J, the late Tiller K G and Smart M K 1997 Speciation of cadmium in soil solution of saline/sodic soils and relationship with cadmium concentrations in potato tubers. Aust. J. Soil Res. 35, 1–17.
McLaughlin M J, Andrews S J, Smart M K and Smolders E 1998 Effects of sulfate on cadmium uptake by Swiss chard: I. Effects of complexation and calcium competition in nutrient solutions. Plant Soil 202, 211–216.
Parker D R, Norvell W A and Chaney R L 1995 GEOCHEM-PC: A chemical speciation model for IBM and compatible computers. In Chemical Equilibrium and Reaction ModeI. Eds. R H Loeppert et al. pp 253–269. SSSA Spec. Pub. No. 42. Soil Science Society of America, Madison, WI.
Salardini A A, Sparrow L A and Holloway R J 1993 Effects of potassium and zinc fertilizers, gypsum and leaching on cadmium in the seed of poppies (Papaver somniferum L.). In Plant Nutrition — from Genetic Engineering to Field Practice. Ed. N J Barrow. 795–798. Kluwer Academic Publishers, Dordrecht, the Netherlands.
Smolders E and McLaughlin M J 1996 Chloride increases cadmium uptake in Swiss chard in a resin-buffered nutrient solution. Soil Sci. Soc. Am. J. 60, 1443–1447.
Smolders E, Lambrechts R-M, McLaughlin M J and the late Tiller K G 1997 Effect of soil solution chloride on Cd availability to Swiss chard. J. Environ. Qual. 27, 426–431.
Soil Survey Staff 1992 Keys to soil taxonomy. Soil Manage. Support Serv. Tech. Monogr. No. 19, 5th ed. Pocahontas Press, Blacksburg, Virginia.
Sparrow L A, Salardini A A and Johnstone J 1994 Field studies of cadmium in potatoes (Solanum tuberosum L.). III. Response of cv. Russet Burbank to sources of banded potassium. Aust. J. Agric. Res. 45, 243–249.
Tyler L D and McBride M B 1982 Influence of Ca, pH and humic acid on Cd uptake. Plant Soil 64, 259–262.
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McLaughlin, M., Lambrechts, R., Smolders, E. et al. Effects of sulfate on cadmium uptake by Swiss chard: II. Effects due to sulfate addition to soil. Plant and Soil 202, 217–222 (1998). https://doi.org/10.1023/A:1004381413048
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DOI: https://doi.org/10.1023/A:1004381413048