Studying of interaction effect between organic matter and arsenic element on transfer coefficient (TC) in cress plant

Abstract:This research was done aimed to Studying of Interaction Effect between Organic Matter and Arsenic Element on Transfer Coefficient (TC) in Cress plant. The research was performed in the flowerpot format in a completely randomized format design as factorial with three replications. The treatments included two levels of organic substance (0 and 10 tons per hectare) and three levels of arsenic (0, 20 and 40 mg/kg). After full growth of the plant, the total arsenic concentrations were measured using atomic absorption device in aerial organs of the shoots and in the soil. The statistical analysis and means comparison were performed using MSTAT-C software and applying DMRT method at 5% and 1% levels. The results showed that arsenic treatment effect on the element retention rate in the plant shoot was significant at 1% level. Also, the results from comparing the means of interactions showed that the arsenic absorption at 40 mg/kg treatment in the presence of organic substance increased by 22% compared to control treatment. Also, in any level of organic material with increasing levels of arsenic, the transfer coefficient has increased; so that the highest Arsenic rate reading in the organic material and 20 mg/kg Arsenic treatment was observed as 42 percent. However, it is noteworthy that due to the plantʹs ability to absorb arsenic and other heavy elements, planting of this plant in order to grow vegetables for food should be avoided in the lands that are likely to be contaminated with these elements. Finally, it was suggested that given the plant ability to absorb, this plant can be used as a purifier plant to purify arsenic-contaminated soil.