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Journal of Biological Sciences
Year: 2001  |  Volume: 1  |  Issue: 11  |  Page No.: 1056 - 1059

Effect of Variation in Harvest Time on the Uptake of Metals by Barley Plants from Soil Amended with Sludge and Compost

J. Nouri, P. J. Peterson and B. J. Alloway    

Abstract: Increasing the metal concentrations by amending the sewage sludge increased the metal content in barley leaves. The yield of the 100 % sludge was the lowest and the soil pH was lowered as well. With the increase in time, the metal removal by plants is also increased. Chromium in barley behaved differently to the other metals studied, showing a declination with time. High voltage application of soluble chromium in solution culture resulted in decreased concentration of nitrogen, phosphorous, potassium , copper, iron, magnesium and zinc in barley and produced toxic effects and reduced growth. The metal uptake by plants from sludge amended soil was influenced by time of harvesting and stage of growth.

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