https://scholars.lib.ntu.edu.tw/handle/123456789/356846
標題: | Pedogenic development of volcanic ash soils along a climosequence in Northern Taiwan | 作者: | Tsai, C.C. ZUENG-SANG CHEN Kao, C.I. Ottner, F. Kao, S.J. Zehetner, F. |
關鍵字: | Allophane; Andic soil properties; Andisols; Imogolite; Phosphate retention | 公開日期: | 2010 | 卷: | 156 | 期: | 1-2 | 起(迄)頁: | 48-59 | 來源出版物: | Geoderma | 摘要: | Andisols have been shown to evolve over time to other, more weathered soil types. However, more information is needed on the time-scales over which these changes occur under different climatic conditions. In this study, we analyze mineral weathering and soil formation along a soil climosequence formed on volcanic deposits of > 400 ka of age in the subtropical climate of Northern Taiwan. We sampled 6 pedons at elevations between 140 and 1090 m above sea level (asl), representing a climatic gradient from about 22 °C mean annual temperature (MAT) and 2000 mm mean annual precipitation (MAP) to about 16.5 °C MAT and 5000 mm MAP. Our results show that phosphate retention, Alo + 1/2Feo, Sio and the Feo/Fed ratio significantly increased with elevation. The high-elevation soils (> 900 m asl) contained metastable poorly crystalline materials (e.g. allophane, ferrihydrite) and classified as Andisols, whereas the low-elevation soils (< 300 m asl) contained thermodynamically more stable minerals (e.g. kaolinite, hematite) and classified as Inceptisols. The soils at intermediate elevation (400 to 500 m asl) were at the threshold of andic soil properties and classified as Andic Inceptisols. Our study demonstrates the strong influence of climate on pedogenesis in subtropical volcanic landscapes. © 2010 Elsevier B.V. All rights reserved. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-77649338127&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/356846 |
DOI: | 10.1016/j.geoderma.2010.01.007 | SDG/關鍵字: | Andisols; C-means; Climatic conditions; Ferrihydrites; Imogolite; Inceptisols; Mean annual precipitation; Mineral weathering; Northern Taiwan; Soil formations; Soil property; Subtropical climates; Time-scales; Volcanic ash soil; Volcanic deposits; Weathered soils; Aluminosilicates; Crystalline materials; Iron ores; Kaolinite; Oceanography; Oxide minerals; Plants (botany); Volcanoes; Weathering; Soils; allophane; Andisol; climate change; imogolite; Inceptisol; pedogenesis; precipitation (climatology); sea level change; soil type; timescale; volcanic ash; weathering; Taiwan |
顯示於: | 農業化學系 |
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