Effect of selected amendments on cadmium content in the soil and its transfer into crops
2010
Hecl, J., Plant Production Research Center, Piešťany (Slovak Republic)
Effect of selected amendments on the input of Cd into the crops, such as peas, spring barley, carrot and red beet was tested in a field trial in the years of 2006–2008. The trial was three times replicated. Trial plots were localized close to the possible source of contamination such as Chemko, a chemical company in Strážske and a waste dump. The whole trial site was highly contaminated by Cd. Its content exceeded the highest content allowed by the Law on Soil Protection No. 220/2004. Soil acidity of the trial soil expressed as pH in KCl solution was 6.2 and soil organic mater content was 2.4%. Cd content was tested in the following parts of the crops: pea seed, spring barley green mater, carrot root and red beet tuber. Cd content in the soil and in the plants was detected in the solution of 2M HNO3 by the AAS method. Applied amendments decreased Cd content in the soil under all treatments in comparison with the untreated check. The highest decrease was found when Condit was applied. Condit, an organic fertilizer, decreased the average Cd content in the crops about 37% and Mitchurin, a mineral fertilizer, about 20%. The highest decrease of Cd content in the crops, about 55% in comparison with the untreated check, was found in carrot root when Condit was applied. Our results revealed that active carbon is the least suitable soil amendment to decrease Cd content in the crops. Active carbon decreased Cd content in the crops only by 9.8%. Condit was found as the most effective amendment to decrease Cd content in the soil and consequently in the crops. Performed ANOVA confirmed significant effect of the amendment treatments on Cd content decrease in the tested crops.
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