Effects of liming on soil properties and P solubility in some Spanish Andosols
The effect of application of liming material (CaCO3 or CaSiO3) and phosphate, on pH, exchangeable Al, effective cation exchange capacity (ECEC) and P solubility is studied in several variable-charge soils of volcanic origin from Canary Island (Spain). The amendments were added to replace 1.5 × or 2.5 × exchangeable Al, and P was applied at rates to provide equilibrium solution concentrations of 1 mg l-1. Incubation of the samples with P, had very little or no effect on pH and on the exchangeable Al content of the soils. When P and amendments were combined, exchangeable Al levels declined with no concomitant effect on pH. Phosphate application alone produced a small increase in the effective cation exchange capacity (ranging from 0.2 to 16.1 mmolc kg-1). This effect being much more marked when liming materials were previously added. Prior addition of CaCO3 did not produce any effect on solution P, irrespective of the exchangeable Al content of the soils. On the contrary, in some of the soils CaSiO3 treatment increased P concentration in solution.
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| Format: | artículo biblioteca |
| Published: |
Elsevier BV
1994
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| Online Access: | http://hdl.handle.net/10261/244512 http://dx.doi.org/10.13039/501100008737 |
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