Fertilizing Properties of Potassium Feldspar Altered Hydrothermally
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ciceri_Communicationsinsoilscienceandplantanalysis_2019.pdf
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1.05 MB
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Rock_dust_supplementary_final.pdf
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supplementary information
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270.21 KB
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Author(s)
Ciceri, Davide
Close, Thomas Charles
Barker, Allen V.
Allanore, Antoine
Date Issued
January 2019
Journal
Communications in Soil Science and Plant Analysis
Publisher
Informa UK Limited
Citation
Ciceri, Davide et al. "Fertilizing Properties of Potassium Feldspar Altered Hydrothermally." Communications in Soil Science and Plant Analysis 50, 4 (January 2019): 482-491. © 2019 Taylor & Francis Group, LLC.
Version
Author's final manuscript
Abstract
The material obtained through hydrothermal alteration of K-feldspar rock in alkaline conditions is a potential source of soluble potassium (K), but agronomic testing is needed to verify its capacity to supply K to crops. A (NH₄)₂SO₄ ₋based bioassay was used to test the capacity of the material to supply K to tomato plants (Lycopersicon esculentum Mill.) growing in a mixture of silt loam, peat moss, and sand. Potassium chloride (KCl) and unaltered K-feldspar rock powder also were tested for comparison. The fresh weight and K composition of the plants increased as doses of KCl or hydrothermal material increased, but not with increases in K-feldspar rock. Development of stem lesions, which develop as symptoms of K deficiency in the presence of (NH₄)₂SO₄, were eliminated by KCl or hydrothermal material but not by feldspar rock. A beneficial effect may occur due to the calcium (Ca) supplied or with adjustment of soil acidity by the hydrothermal material. The hydrothermal material is a K fertilizer at least as effective as KCl since it yields the same or better plant weight.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
MIT Materials Research Laboratory
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DOI of Published Version
https://doi.org/10.1080/00103624.2019.1566922
