Copper Lability in Soils Subjected to Intermittent Submergence
- M. Biasioli *a,
- J. K. Kirbyb,
- G. M. Hettiarachchib,
- F. Ajmone-Marsana and
- M. J. McLaughlinb
- a DI.VA.P.R.A., Chimica Agraria, Univ. di Torino, Via Leonardo da Vinci, 44, 10095 Grugliasco, Torino, Italy
b J.K. Kirby, G.M. Hettiarachchi, and M.J. McLaughlin, CSIRO Land and Water, Glen Osmond, SA 5064, Australia; G.M. Hettiarachchi, Dep. of Agronomy, Kansas State Univ., Manhattan, KS 66506. Assigned to Associate Editor Andrew Tye
Reducing conditions in soils can have significant influences on the availability of nutrient and toxic metals, through their remobilization, their release through reductive dissolution of oxide phases, and from the formation of precipitates. In the literature, contrasting results are reported on the effects of temporary waterlogging conditions on the availability of metals. In the present study, changes in the “labile” or “potentially available” pool of copper (Cu) in soils as a consequence of up to three intermittent soil submergence cycles was investigated using isotopic dilution. The soils (an Oxisol and an Inceptisol) selected were amended in the field with both biosolids-Cu and salt-Cu. Intermittent soil submergence was found to have a significant effect on the lability of Cu in soils, with E total values generally increasing in all the treatments with the different submergence cycles, the highest lability of Cu observed in the Cu-salt treatment. The presence of nonexchangeable colloidal forms of Cu, influenced by treatments and submergence cycles, was also reported.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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