STUDIES ON SALINE SOILS IN KHON KAEN REGION, NORTHEAST THAILAND : I. Physical and Chemical Properties of Saline Soils

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概要

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• Saline soils occur extensively in Northeast Thailand. As the climate of this region is clearly differentiated into dry and rainy seasons, salts in the groundwater move up and accumulate on the soil surface during the dry season and are leached down with rainfall during the rainy season. In this paper, the physical and chemical properties concerned with salt movement were investigated for the saline soils in the Khon Kaen Region, Northeast Thailand. Changes in the physical and chemical properties with leaching were also studied in order to determine the effect of rainfall on desaltation. The saline soils in the Khon Kaen Region are generally sandy with low CEC, low content of organic matter and low buffering capacity. The dominant salt is NaCl, which facilitates the dispersion of clay. The main types of clay minerals are 1 : 1 type . All the soils contained large amounts of quartz, indicating that they are highly weathered soils. The amount of materials dispersed by water leaching, mainly clay, accounted for the large percentage of clay and silt fractions.

• 社団法人日本土壌肥料学会の論文

著者

• KIMURA Makoto

  Faculty of Agriculture, The University of Tokyo

• Patcharapreecha P

  Khon Kaen Univ. Khon Kaen Tha

• Topark-Ngarm Bubpha

  Faculty of Agriculture, Khon Kaen University

• Goto Itsuo

  Faculty Of Agriculture Tokyo University Of Agriculture

• Patcharapreecha Pongsiri

  Faculty of Agriculture, Khon Kaen University

• Topark-ngarm Bubpha

  Faculty Of Agriculture Khon Kaen University

• Kimura Makoto

  Faculty Of Agriculture Kyushu University Graduate School

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