Diversity of Clay Minerals in the Vertisols of Three Different Climatic Regions in Western Iran
محل انتشار: مجله علوم و فناوری کشاورزی، دوره: 10، شماره: 3
سال انتشار: 1387
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 44
فایل این مقاله در 16 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JASTMO-10-3_009
تاریخ نمایه سازی: 23 آبان 1402
چکیده مقاله:
Considerable information exists in the literature showing that expansive layer silicates are not the only clay minerals present in vertisols. However, the presence of a very high clay content dominated by fine clay, regardless of the clay type, together with the wetting and drying cycle in the soil can also produce a high shrink-swell potential. We studied some vertisols with diverse parent materials and climates from western Iran to investigate the role of parent material and climate on formation of these soils. The vertisols of Fars Province (Southwest Iran) have formed on calcareous sediments with ustic-hyperthermic soil moisture and temperature regimes and a mineralogical composition dominated by a palygorskite-chlorite suite. The vertisols of Lorestan Province (Midwest Iran) are also formed from calcareous sediments under the xeric moisture and thermic temperature re-gime, and contain vermiculite as the dominant clay mineral. In Kermanshah Province, vertisols have formed on limestone or in calcareous sediments. They have xeric-thermic soil moisture and temperature regimes. In Ardebil Province, vertisols are formed on vol-canic sediments, and they have xeric-mesic soil moisture and temperature regimes. All vertisols, except those from Fars Province, are classical ones and include montmorillonite in the clay fraction. Our study shows that the interparticle pore size that is controlled by the size of primary particles, regardless of its nature, contributes to the shrink-swell po-tential in the soils we studied in Iran.
کلیدواژه ها:
نویسندگان
A. Heidari
Department of Soil Sciences, College of Agriculture and Natural Resources, University of Tehran, Tehran, Islamic Republic of Iran.
Sh. Mahmoodi
Department of Soil Sciences, College of Agriculture and Natural Resources, University of Tehran, Tehran, Islamic Republic of Iran.
M. H. Roozitalab
Agricultural Research and Education Organization, Tehran, Islamic Republic of Iran.
A. R. Mermut
Saskatchewan Centre for Soil Research, Department of Soil Science, University of Saskatchewan, ۵۱Campus Drive, Saskatoon, Canada.