摘要：Present study was carried out in different areas of Punjab, Pakistan in order to explore the effect of diverse sources of water (ground, sewage, industrial) on the chromium contents of soil and various varieties (Punjab-2011,Seher-2006,Faisalabad-2008, Wa- tan) of wheat plant in two cropping years. The great health hazard has been associated with the exposure of food crop to the toxic heavy metals. It was noticed that the main reason of elevated level of heavy metals in the soil and wheat plant is due to the increased irrigation with wastewater. The concentration of chromium in all types of water, soil and wheat plant (root, shoot, grains) samples was varied from (2.803.40 mg/l), (1.78-3.24 mg/kg), (1.42-2.28, 1.142.86, 0.78-1.48 mg/kg), respectively. The chromium concentration in all types of water samples was found higher than the maximum permissible level (0.1 mg/l). However, the chromium contents in soil (65 mg/kg) and wheat grains (2.3 mg/kg) samples were found within the maximum permissible levels. All the samples showed the bio-concentration factor, pollution load index, daily intake of metal and health risk index for chromium less <1 while the bioaccumulation factor, translocation factor and enrichment factor of chromium were found >1 for some samples. Regular monitoring of wheat crop is recommended in light of these results to lessen the health risks in humans.
