Mortvedt JJ (1987) Cadmium levels in soils and plants from some long-term soil fertility experiments in the United States of America. Mc Bride MB, Tyler LD and Hovde DA (1981) Camium adsorption by soils and uptake by plants as affected by soil chemical properties. Kuo S, Jellum EJ and Baker AS (1985) Effect of soil type, liming and sludge application on zinc and cadmium availability to Swish Chard. Jaakola A (1979) The effect of cadmium contained in fertilizer on the cadmium content of vegetables. In: Arendt F, Hinsenveld M and Van den Brink W J (eds.) Contaminated Soil '90, pp 186–196. Jones KC (1990) Atmospheric deposition as a source of heavy metals and organic contaminants to agroecosystems. Relationship between Cd concentration in crops and extractable Cd in the soil. He QB and Singh BR (1994b) Cadmium uptake by crops from phosphate fertilizers. He QB and Singh BR (1994a) Cadmium uptake by crops from phosphate ferilizers 1. He QB and Singh BR (1993c) Effect of organic matter on the distribution, extractability and uptake of cadmium in soils. Agric Scand, Sect B, Soil Plant Sci 43: 142–150 Factors related to the extractability and plant uptake of cadmium in cultivated soils. He QB and Singh BR (1993b) Plant availability of cadmium in soils. Agric Scand, Sect B, Soil Plant Sci 43: 134–141 I Extractable Cd in newly and long-term cultivated soils. He QB and Singh BR (1993a) Plant availability of cadmium in soils. Guttormsen G (1990) Cadmium and lead levels in Norwegian vegetables. K Lantbruks Høgsk Ann 26: 199–215 (In German)Įriksson JE (1989) The influence of pH, soil type and time on adsorption and uptake by plants of Cd added to the soil. Chemical etraction methods for phosphorus and potassium determination. Water Air Soil Pollut 44: 71–82ĭam Kofoed A and Søndergård KP (1983) Effect of fertilization on Cd content of soil and plants, Tidsskr Planteavl 87: 23–32 (In Danish)Įgner H, Riehm H and Domingo WR (1960) Investigations of the chemical soil analysis as a basis for the evaluation of nutrient status in soil. Watez Air Soil Pollut 21: 115–125Ĭhristensen TH (1989) Cadmium soil sorption at low concentrations: VIII. Reversibility, effect of changes in solute composition, and effect of soil aging. Norw J Agric Sci 4: 252–260Ĭhristensen TH (1984) Cadmium soil sorption at low concentrations: II. Swed J Agric Res 11: 3–10īærug R and Singh BR (1990) Cadmium levels in soils and crop after long-term use of commercial fertilizers. In: Assink JW and Van den Brink WJ (eds.) Contaminated Soil, Martinus Nijhoff Publishers, pp 101–113Īndersson A and Hahlin M (1981) Cadmium effects from P fertilization in field experiments. Sandefjørd, NorwayĪlloway BJ and Morgan H (1986) The behaviour and availability of Cd, Ni and Pb in polluted soils. In: Drabløs D and Tollan A (eds) Ecological Impact of Acid Precipitation, pp 102–103. Cadmium extracted by ammonium nitrate after harvest of the crops was closely related with soil pH and Cd concentration in the plants.Īllen RO and Steinnes E (1980) Contribution from long-range atmospheric transport to the heavy-metal pollution of surface soils. Cadmium concentration generally increased over the years. Cadmium uptake by chinese cabbage from different sources of phosphate rock was affected to a very limited extent. At pH 5.5, Cd concentrations in the two crops, based on a three-year average, were 23 and 46% higher than at pH 6.5. ![]() Cadmium removals by chinese cabbage and carrot were about 0.7 and 1.3 g ha −1 yr −1, respectively. Carrot leaves contained higher Cd than its roots. Chinese cabbage exhibited lower Cd concentration than carrots. ![]() The Cd uptake by both crops was significantly ( p<0.01) higher at pH 5.5 than at pH 6.5. The increased Cd application rates through NPK fertilizers increased the Cd concentration in both vegetables but the differences among treatments were not found to be significant. The amounts of Cd added through phosphate rock also ranged between 0.1 and 28 g ha −1 yr −1. The NPK fertilizers containing 1, 30, 90, and 400 mg Cd kg −1 P were applied at the rate of 0.07, 2.1, 6.3 and 28 g Cd ha −1 yr −1. ![]() Field trials were conducted over a three-year period with chinese cabbage ( Brassica pekinensis Rupr.) and carrots ( Daucus carota L.) grown in a sandy soil with pH adjusted to 5.5 and 6.5.
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