CLAY MINERALOGY OF PADDY SOILS DEVELOPED ON DIFFERENT LANDFORMS IN THE EAST OF GILAN PROVINCE, NORTHERN IRAN

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TORABI GELSEFIDI H.; KARIMIAN EGHBAL M.; GIVI M.J.; KHADEMIL H.

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Journal: Iranian Journal of Soil Research Year:2001 | Volume:15 | Issue:1 Page(s): 122-139

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Title

CLAY MINERALOGY OF PADDY SOILS DEVELOPED ON DIFFERENT LANDFORMS IN THE EAST OF GILAN PROVINCE, NORTHERN IRAN

Author(s)

TORABI GELSEFIDI H. | KARIMIAN EGHBAL M. | GIVI M.J. | KHADEMIL H. | Issue Writer Certificate

Keywords

PADDY SOILSQ4

AQUIC AND ANTHRAQUIC CONDITIONSQ2

GILAN PROVINCEQ4

SMECTITEQ4

ILLITEQ3

KAOLINITEQ4

VERMICULITEQ4

Abstract

Clay minerals with their high surface areas and negative charges are very important for plant nutrition. Qualitative, and semi-quantitative studies as well as structural identification of these minerals could provide good information about adsorption, fixation and release of different cations. In this study, clay mineralogy of five PADDY SOILS in upland, plain, lowland (marsh) and old and recent beach positions were investigated. Sand, silt and clay fractions were separated by centrifuge after the removal of organic matter, carbonates and sesquioxides. For identification of clay minerals, clay suspensions were saturated by Mg and K and then 7 mg of clays were placed on glass slides for XRD analysis. In addition, particles of fine clays were observed by scanning electron microscope (SEM) and analyzed by energy dispersive X-ray analyzer (SEM-EDXRA.). In all of the soils studied, SMECTITE, KAOLINITE, ILLITE and VERMICULITE clay minerals were identified. In recent beach position, which was a young landform and lowland under reducing condition, chlorite was identified. But, in the soils developed in upland, plain, and old beach deposits, chlorite was not observed. Clay mineralogy is probably more affected by parent materials and less influenced by AQUIC AND ANTHRAQUIC CONDITIONS. However, there are some. indications that aquic and anthraquic condition may affect quantity of clay minerals, as shown by higher SMECTITE in poorly drained soils. Structural composition of fine clays showed isomorphic substitutions in tetrahedral and octahedra] sheets. XRD results indicated the presence of high charged SMECTITEs, which may act like VERMICULITEs in fixing cations such as potassium.

Cites

MINERALOGY OF SOILS AND DIFFERENTIATION OF HYDROXY INTERLAYER SMECTITE FROM VERMICULITE ON SEFIDRUD RIVER TERRACES IN CENTRAL GILAN PROVINCE

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APA: Copy

TORABI GELSEFIDI, H., KARIMIAN EGHBAL, M., GIVI, M.J., & KHADEMIL, H.. (2001). CLAY MINERALOGY OF PADDY SOILS DEVELOPED ON DIFFERENT LANDFORMS IN THE EAST OF GILAN PROVINCE, NORTHERN IRAN . IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES, 15(1), 122-139. SID. https://sid.ir/paper/15941/en

Vancouver: Copy

TORABI GELSEFIDI H., KARIMIAN EGHBAL M., GIVI M.J., KHADEMIL H.. CLAY MINERALOGY OF PADDY SOILS DEVELOPED ON DIFFERENT LANDFORMS IN THE EAST OF GILAN PROVINCE, NORTHERN IRAN . IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES[Internet]. 2001;15(1):122-139. Available from: https://sid.ir/paper/15941/en

IEEE: Copy

H. TORABI GELSEFIDI, M. KARIMIAN EGHBAL, M.J. GIVI, and H. KHADEMIL, “CLAY MINERALOGY OF PADDY SOILS DEVELOPED ON DIFFERENT LANDFORMS IN THE EAST OF GILAN PROVINCE, NORTHERN IRAN ,” IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES, vol. 15, no. 1, pp. 122–139, 2001, [Online]. Available: https://sid.ir/paper/15941/en

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