Changes of pH across the rhizosphere induced by roots
@article{Nye2005ChangesOP, title={Changes of pH across the rhizosphere induced by roots}, author={Peter Hague Nye}, journal={Plant and Soil}, year={2005}, volume={61}, pages={7-26} }
SummaryPlants that absorb nitrogen as NO3− tend to raise the pH in the rhizosphere. Those absorbing nitrogen as NH4+ or N2 lower the pH. The change in pH near the root surface may be calculated approximately from the H+ or HCO3− efflux and radius of the root; and the pH buffering capacity, moisture content, initial pH and pCO2 of the soil. An accurate equation, solved numerically, also takes account of root hairs, mass flow and slow acid-base reaction in the soil. The pH at the root surface…
298 Citations
pH changes in the rhizosphere in relation to the pH-buffering of soils
- ChemistryPlant and Soil
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The low buffering capacity for soils of pH near 6 seems to be valid for a large number of soils with different properties.
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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…
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Douglas-fir, grown on strongly acid soil (pH-H2O 3.87), was fertilized with ammonium, nitrate or ammonium nitrate as N-source. Rhizosphere pH along the root axis was measured with microelectrodes.…
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- Environmental SciencePlant and Soil
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- ChemistryPlant and Soil
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Mobilization of soil P as the result of plant-induced changes of soil pH in the vicinity of plant roots was studied. Seedlings of ryegrass were grown in small containers separating roots from soil by…
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A method to control the rhizosphere pH of plants under controlled nutritional conditions is suggested. An earlier developed method for plant growth in soilless culture according to the principle of…
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- Environmental ScienceEnvironmental science & technology
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A sensitivity analysis showed the importance of soil sorption and speciation parameters as influenced by pH and CO2 pressure; and of root geometry and root-induced acid-base changes linked to the form of nitrogen taken up by the root.
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Struvite is increasingly considered a promising alternative to mined phosphorus (P) fertilizer. However, its solubility is very low under neutral to alkaline pH while it increases with acidification.…
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- Environmental Science
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The root system is immediately surrounded by a narrow zone of soil called the rhizosphere. A major proportion of biodiversity of the soil resides in the rhizosphere, hence accounting for the various…
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