Quantitative Effect of Soil Texture Composition on Retardation Factor of K+ TransportEnglish Full Text
WANG YU and ZHANG YIPING Department of Natural Resources and Environmental Sciences, Northwest Science and Technology University of Agriculture and Forestry, Yangling, Shaanxi 712100 (China)
Abstract: With six packed columns composed of ＜ 1 μm and 5 μm～0.25 mm fractions from an Eum-Orthic An- throsol （Columns 1～6） and one column of the Eum-Orthic Anthrosol （Column 7）, K～（+） transport experiments under the condition of saturated steady water flow were conducted to qualify the effects of soil texture com- position on the retardation factor （R） of K～（+） transport. The results showed that the retardation factor of K～ （+） transport in the tested soil columns greatly increased with increasing clay contents. In an attempt to use pedo-transfer function （PTF） approach in the solute transport study, a preliminary PTF was established through the six packed columns （Columns 1～6） with soil basic data including soil bulk density, volumet- ric water content and clay content to predict the retardation factor, and proved valid by the satisfactory prediction of R in Column 7.
- Series：
(D) Agriculture
- Subject：
Fundamental Science of Agriculture; Agronomy
- Classification Code：
S152.4
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