EFFECT OF ZN ON THE CONCENTRATION OF CD AND ZN IN PLANT-TISSUE OF 2 DURUM-WHEAT LINES

Irrespective of fertilizer treatments, durum wheat (Triticum turgidum L. var durum) Cd concentration was lowest in the grain and highest in the roots and was in the order: root > leaf > stem > grain. Soil-appli ed Zn decreased the Cd concentrations in durum wheat grain, leaf, stem , and root. But, foliar application of Zn resulted in Zn loading of th e leaf and stem and had little effect on plant Cd concentration. Appli cation of P and N plus P fertilizer increased tissue Cd concentration and decreased stem and leaf Zn concentration to near insufficiency, wh ile application of Zn to soil with N plus P fertilizers increased tiss ue Zn concentration to sufficiency level and decreased plant Cd concen tration of the two durum wheat lines.