Abstract
The rhizobox system offers quantitative information concerning within the pH changes the range of the rhizosphere. The movement of 65Zn, 54Mn and 59Fe across the rhizosphere of soybean was examined. The contributions of the rhizosphere processes to heavy metals solubilization was evaluated. Changes in pH values around the roots of barley and soybean were investigated using the rhizobox. Results indicate that the extent to which the rhizosphere pH can differ from that of the bulk soil depends mainly on the plant species and initial bulk soil pH. Apparently, soybean has greater ability than barley to solubiiize heavy metals in the rhizosphere. The range of pH change was different from that of the heavy metals, indicating that the solubility of heavy metals is not only influenced by soil pH.
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Youssef, R.A., Chino, M. Movement of metals from soil to plant roots. Water Air Soil Pollut 57, 249–258 (1991). https://doi.org/10.1007/BF00282888
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DOI: https://doi.org/10.1007/BF00282888