• 作者： 莊作權
• 作者服務機構： 國立中興大學土壤學研究所
• 中文摘要： 六個代表性紅壤剖面分別採自臺北淡水、桃園埔心、臺中后里、埔里大坪項、嘉義大埔美及臺東玉里。以X光繞射鑑定粘粒部份之粘土礦物及礦物，主要以高嶺石及伊來石為主，蛭石次之，亦有少量水鋁石及石英。伊來石一蛭石之混層粘土礦物亦普遍存在於粘粒部份。伊來石經進一步鑑定均屬二八面體構造。 六個剖面粘粒部份，以大坪頂粘粒中Si2∕Al2O3比及SiO2/R2O3比最低，大埔美粘粒其次，顯示六個代表性紅壤之風化程度以大坪項紅壤最高。
• 英文摘要： Six soil profiles representing Taiwan latosols were collected from different locations. The clayminerals in these soils were identified by X-ray diffraction techniques. The dominant clay minerals of theclay fractions from these soils are kaolinite, illite and vermiculite, while gibbsite and quartz exist in relativelysmall amounts. The mixed layers of illite-vermiculite mineral are commonly found in most of the clayfractions of the soils. The illite identified all belongs to the dioctahedral structure. Among six soil profiles, the lowest oxide molar ratios of SiO2/Al2O3 and SiO2/R2O3 were found inTa-ping-ding clays, followed by the Ta-puh-mei clays. This indicates that the degree of weathering in TA-ping-ding soil is higher, as compared to the other soils.
• 中文關鍵字： clay minerals; latosols; X-ray diffraction
• 英文關鍵字： --