Pedosphere 1(2): 117--126, 1991
ISSN 1002-0160/CN 32-1315/P
©1991 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Preliminary Study on Element Leaching and Current Soil-Forming Process of Red Soils |
| ZHAO QI-GUO, XUE SHI-KUI, SHI HUA, WANG MING-ZHU |
| Institute of Soil Science, A cademia Sinica, P.O.Box 821, Nanjing 210008 |
| ABSTRACT |
| The leaching characteristics and the element concentration in soil solution of red soils derived from sandstone, granite, Quaternary red clay and basalt have been studied in the Red Earth Ecological Experimental Station, Academia Sinica, using 12 lysimeters. Results obtained show that the element leaching process of red soils occurs mainly from January to the beginning of July annually. The elements with higher concentration in leaching solution of red soils are Si, Ca, Na, K, Mg, and N. The desilication and the leaching process of base cations occur simultaneously in the red soils. Using the first order differential equation and measured parameters of Si leaching, the leaching models of Si for red soils derived from different parent materials are constructed. The leaching process of Si is simulated with the models. Both the absolute and relative ages of red soils derived from different parent materials are discussed based on the simulation result. |
| Key Words: |
| Citation: Zhao, Q. G., Xue, S. K., Shi, H. and Wang, M. Z. 1991. Preliminary Study on Element Leaching and Current Soil-Forming Process of Red Soils. Pedosphere. 1(2): 117-126. |
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