Evolution of effectiveness of zeolite for cadmium absorption and dry matter in lettuce plant

Cadmium is one of the contaminant elements which inter to the soil in different ways like fertilizer. Many researchers reported the beneficial effects of zeolite on soil remediation. For this purpose a factorial experiment in complete randomized block design with two treatment, zeolite at three levels (0,1 and 2 ton.ha-1) and Cadmium at three levels (0,3 and 6 mg/kg) with three replication on lettuce plant was conducted. The results showed that to enhancing Zeolite application, Cadmium concentration declined in root and shoot. This result demonstrated that Cd had negative effect on growth of plants, however Zeloite had positive effect Also, it concluded that the most effective treatment on decreasing Cadmium concentration was obtained with 2 ton.ha-1 zeolite.