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Mineralogy of Rhizospheric and Non-Rhizospheric Soils in Corn Fields

Published online by Cambridge University Press:  28 February 2024

Hideomi Kodama ,
Sherman Nelson ,
Ann Fook Yang  and
Norihiko Kohyama
Hideomi Kodama
Affiliation:
Centre for Land and Biological Resources Research, Agriculture Canada, Ottawa, Ontario, Canada K1A OC6
Sherman Nelson
Affiliation:
Centre for Land and Biological Resources Research, Agriculture Canada, Ottawa, Ontario, Canada K1A OC6
Ann Fook Yang
Affiliation:
Plant Research Centre, Agriculture Canada, Ottawa, Ontario, Canada K1A OC6
Norihiko Kohyama
Affiliation:
National Institute of Industrial Health, Ministry of Labour, 21-1, Nagao 6-chome, Tama-Ku, Kawasaki, Japan
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Abstract

Technical limitations have restricted investigations of rhizosphere mineralogy. Various analytical techniques were applied to assess root-mineral associations and dynamics in natural soils under corn production. Soil samples were collected between four and five weeks after planting and included rhizospheric and non-rhizospheric soils, and undisturbed block samples containing corn root systems. Analytical techniques were applied and included; X-ray diffraction, optical microscope, SEM, EDXRA with SEM, transmission electron microscope (TEM), electron energy loss spectra with TEM, high-resolution transmission electron microscope (HRTEM) and microanalysis with HRTEM. The mineralogy of the rhizosphere differed from that of the bulk soil. Within the rhizosphere, minute platy particles which were mostly vermiculitic minerals, were particularly concentrated near or on root surfaces. These platy mineral particles were not attached to the entire area, but only to certain areas of root surfaces. Therefore, we report quantitative evidence for mineralogical changes in the rhizosphere in soil environments.

Keywords

CornMineralogyNon-rhizosphereRhizosphere
Type
Research Article
Information
Clays and Clay Minerals , Volume 42 , Issue 6 , December 1994 , pp. 755 - 763
Copyright
Copyright © 1994, Clay Minerals Society

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Footnotes

*

CLBRR Contribution No. 94-04. PRC Contribution No. 1534.

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