Use of a zeolite synthesised from alkali treated kaolin as a K fertiliser : glasshouse experiments on leaching and uptake of K by wheat plants in sandy soil

Zwingmann, Naoko, Mackinnon, Ian D.R., & Gilkes, Robert J. (2011) Use of a zeolite synthesised from alkali treated kaolin as a K fertiliser : glasshouse experiments on leaching and uptake of K by wheat plants in sandy soil. Applied Clay Science, 53(4), pp. 684-690.

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Zeolite N, a zeolite referred to in earlier publications as MesoLite, is made by caustic reaction of kaolin at temperatures between 80 °C and 95 °C. This material has a very high cation exchange capacity (CEC ≈ 500 meq/100 g). Soil column leaching experiments have shown that K-zeolite N additions greatly reduce leaching of NH4+ fertilisers but the agronomic effectiveness of the retained K+ and NH4+ is unknown.

To measure the bioavailability of K in this zeolite, wheat was grown in a glasshouse with K-zeolite N as the K fertiliser in highly-leached and non-leached pots for four weeks and compared with a soluble K fertiliser (KCl).

The plants grown in non-leached pots and fertilised with K-zeolite N were slightly larger than those grown with KCl. The elemental compositions in the plants were similar except for Si being significantly more concentrated in the plants supplied with K-zeolite N. Thus K-zeolite N may be an effective K-fertiliser.

Plants grown in highly-leached pots were significantly smaller than those grown in non-leached pots. Plants grown in highly-leached pots were severely K deficient as half of the K from both KCl and K-zeolite N was leached from the pots within three days.

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ID Code: 48854
Item Type: Journal Article
Refereed: Yes
Additional Information: Corrected proof. Available online 23 July 2011.
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Keywords: Zeolite N, Potassium fertiliser, Wheat, Glasshouse experiment, Nutrient leaching
DOI: 10.1016/j.clay.2011.06.004
ISSN: 0169-1317
Divisions: Current > QUT Faculties and Divisions > Division of Research and Commercialisation
Current > Institutes > Institute for Future Environments
Copyright Owner: Copyright 2011 Elsevier B. V.
Copyright Statement: This is the author’s version of a work that was accepted for publication in <Applied Clay Science>. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Clay Science, [53, 4, (2011)] DOI: 10.1016/j.clay.2011.06.004
Deposited On: 26 Feb 2012 22:34
Last Modified: 27 Feb 2012 19:20

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