Document Type : Research Paper
Authors
1
MSc., Soil Science Department, Faculty of Agriculture, University of Zanjan, Iran
2
Professor, Soil Science Department, Faculty of Agriculture, University of Zanjan, Iran
3
PhD., Soil Science Department, Faculty of Agriculture, University of Zanjan, Iran
Abstract
With the growth of industries and technologies, the entry of pollutants, especially heavy metals, into the soil has raised the international community's concern about food security. The aim of this study was to investigate the effect of cadmium on some growth indicators and nutrient concentrations of different wheat cultivars. For this purpose, a factorial pot experiment was conducted in greenhouse conditions using a completely randomized design with three replications. The studied factors included five levels of soil contamination by cadmium (zero, 10, 25, 50, and 100 mg Cd/kg of soil) from the source of cadmium sulfate [3Cd (SO4).8H2O] and four wheat cultivars (Zare, Pishgam, Mihan, and Orum). The results showed that different levels of soil cadmium significantly reduced wet and dry weights of the aerial part and root, leaf chlorophyll index, plant height, as well as nitrogen, phosphorus, potassium, iron and copper concentrations of different wheat cultivars. The highest levels of these traits were obtained from the control treatment (without cadmium contamination), and the lowest from the treatment with 100 mg Cd/kg of soil. Different wheat cultivars reacted differently to various levels of soil cadmium. Pishgam and Orum cultivars showed the least sensitivity and Mihan cultivar showed the highest sensitivity to soil contamination by cadmium.
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