Influence of root-induced pH on the solubility of soil aluminium in the rhizosphere |
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| Authors: | Tara Singh Gahoonia |
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| Affiliation: | (1) Institute for Agricultural Chemistry, Georg-August University, von Siebold str. 6, DW-3400 Göttingen, Germany;(2) Present address: Section for Soil and Water and Plant Nutrition, Department of Agricultural Sciences, The Royal Veterinary and Agricultural University, Thorvaldsensvej 40, DK-1871 Frederiksberg, Copenhagen, Denmark |
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| Abstract: | Increase in solubility of soil aluminium (Al) as a result of root-induced decrease of soil pH was studied. Soil samples of known distances from the roots of NH4-N fertilized Ryegrass were analyzed for pH and aluminium extractable with 0.01 M CaCl2. Results showed that though no Al was found in bulk soil (pH 6.8), its concentration in the vicinity of roots increased to 0.023 mM with a concomitant decrease of soil pH from 6.8 to 4.4. |
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| Keywords: | aluminium toxicity rhizosphere soil pH |
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