Abstract
The effects of zinc application on zinc uptake, distribution and translocation in maize and barley grown in zinc deficient soil with high pH and high calcium content were studied. Zn65 content and uptake in roots, sheaths and blades of maize and barley plants increased significantly with increased levels of zinc application. The sheaths contained highest Zn65 content followed by roots and blades. The distribution of total zinc, however, differed from that of radioactive zinc. The roots had the highest zinc content, followed by sheaths and blades. The two species differed very little in zinc distribution patterns. The autoradiographs of intact maize and barley plants showed that Zn65 was fairly evenly distributed in the main and auxiliary roots, but, there was a relatively higher concentration at the root-stem junction. The Zn65 concentration was higher in nodes than in internodes, and in young emerging leaves compared to older leaves. re]19730819
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