| 释义 |
eluviation Soil Sci.|ɪljuːvɪˈeɪʃən|
[as if ad. L. *ēluviatiōn-em, noun of action f. ēluĕre to wash off.]
The lateral or vertical movement of material in solution or suspension through the soil.
1924Geol. Mag. LXI. 450 Situations where surface erosion is sufficiently rapid to predominate over eluviation. 1928in B. D. Jackson Gloss. Bot. Terms (ed. 4) Suppl. 1930L. A. Wolfanger Major Soil Divisions of U.S. ii. 45 The extraction and concentration are brought about in part through eluviation. 1932G. W. Robinson Soils iii. 53 We may refer to the translocation of material either mechanically or in solution, as eluviation, and two main types of eluviation may be distinguished..mechanical eluviation, in which..the finer fractions of the mineral portions of the soil are washed down to lower levels, and..chemical eluviation in which decomposition occurs and certain products thus liberated are translocated in true or colloidal solution. 1952L. M. Thompson Soils & Soil Fertility vi. 73 The term eluviation designates the movement or shifting of the materials through the soil body. 1957Gloss. Geol. (Amer. Geol. Inst.) 94/2 Eluviation may take place downward or sidewise according to the direction of water movement. 1968R. W. Fairbridge Encycl. Geomorphol. 1001/1 Infiltrating precipitation passes through the slope prism, exiting by the lower boundary and carrying down ions, colloids and perhaps even mineral particles of clay and silt grades, a process generally termed eluviation, or simple leaching. |