Pedosphere 16(1): 100--107, 2006
ISSN 1002-0160/CN 32-1315/P
©2006 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Electrical conductivity in soil extracts: Chemical factors and their intensity |
LIU Guang-Ming , YANG Jing-Song and YAO Rong-Jiang |
| Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: gmliu@mail.issas.ac.cn |
| ABSTRACT |
| The electrical conductivity (EC) of 1:5 soil-water extract (EC1:5) was studied utilizing path coefficient analysis. The study focused on revealing the main chemical factors contributing to EC of soil extracts and their relative importance. Results showed that the most important factors influencing the EC1:5 of coastal salt-affected soils were the concentration of salt in 1:5 soil-water extract (Sc), Cl-, and the sodium adsorption ratio (SAR), while effects of pH, CO32-, HCO3-, soluble sodium percentage (SSP), and sodium dianion ratio (SDR) were very weak. Though the direct path coefficients between EC1:5 and SO42-, Ca2+, Mg2+, K+, or Na+ were not high, influence of other chemical factors caused the coefficients to increase, making the summation of their direct and indirect path coefficients relatively high. Evidences showed that multiple regression relations between EC1:5 and most of the primary factors (Sc, Cl-, and SAR) had sound reliability and very good accuracy. |
| Key Words: chemical properties, electrical conductivity, impact factor, soil salinization |
| Citation: Liu, G. M., Yang, J. S. and Yao, R. J. 2006. Electrical conductivity in soil extracts: Chemical factors and their intensity. Pedosphere. 16(1): 100-107. |
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