Pedosphere 4(4): 347--356, 1994
ISSN 1002-0160/CN 32-1315/P
©1994 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Salt-water dynamics in soils: IV. Changes of ionic composition in soil profiles during water evaporation and infiltration |
| MENG Fan-Hua and YOU Wen-Rui |
| Institute of Soil Science, Academia Sinica, P. O. Box 821, Nanjing 210008 (China) |
| ABSTRACT |
| Through a simulation test carried out with soil columns (61.8 cm in diameter), the changes of ionic composition in soil profile during the processes of water evaporation and infiltration were studied. Under evaporation conditions, ions moving upward with fresh groundwater were mainly Cl-, SO42-, Ca2+, and Na+. When the mineralized groundwater took part in the salt accumulation, the ionic composition in soils was close to that in ground water supplemented. Under rainfall infiltration conditions, the salt-leaching role occurred mainly in the top soil. With the decrease of total salt content, NO3- and Cl- reduced rapidly, SO42- decreased slowly, but HCO3- had a little change only. Among cations, Na+ and Ca2+ contents lowered at the same speed, and Mg2+ decreased slowly |
| Key Words: ion composition, salt-water dynamics, water evaporation, water infiltration |
| Citation: Meng, F. H. and You, W. R. 1994. Salt-water dynamics in soils: IV. Changes of ionic composition in soil profiles during water evaporation and infiltration. Pedosphere. 4(4): 347-356. |
|
View Full Text
|
|
|
|
