| 释义 |
illuviation Soil Sci.|ɪl(j)uːvɪˈeɪʃən|
[f. prec. + -ation.]
The deposition of salts or colloids in a soil horizon from percolating water which has removed them from another, generally superior, horizon. So iˈlluviated ppl. a., having received material by illuviation.
1928Bull. Amer. Soil Survey Assoc. IX. 31 Illuviation. Ibid. 37 The illuviated horizons of the solum. 1932Forestry VI. 28 The different horizons are designated by capital letters... ‘B’ the horizon of illuviation or deposition. 1949W. W. Weir Soil Sci. (ed. 2) vi. 116 Horizons, commonly topsoil layers, that have lost materials through eluviation are described as eluvial or eluviated; and horizons, commonly subsoil layers, that have received the materials, illuvial or illuviated. 1955F. E. Bear Chem. of Soil i. 37 In pedology, the term eluviation has been applied to the loss of material from the surface horizon, and the term illuviation, to the gain of material by the subsoil horizon. |