Preliminary column experiment on dynamics of water and ion transport in soil affected by root absorption

Kazuki Urayama, Yoshinobu Sakata, Yasutaka Sonoda, Kenji Ebihara, Yuki Sago, Hisashi Yoshikoshi, Takuya Araki, Daisuke Yasutake, Hiroyuki Cho, Tetsuo Kobayashi, Masaharu Kitano

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Abstract

Water deficit and salt accumulation in soil are serious problems in crop fields in semi-arid regions, and these problems are likely to depend on active transpiration and selective ion absorption by crop roots. In this study, a large sized soil column system was newly developed, and a preliminary experiment with the system was conducted to examine the system performance for analyses of dynamics of water and ion transport and salt accumulation in soil with special reference to effects of the active and selective absorption of roots of different crops (i.e., corn plants, sunflower plants and no plants). The column system was equipped with on-line systems for the control of groundwater level and the TDR measurement, which enabled time course evaluations of upward flux of the groundwater, volumetric water content of soils at the different depths and electrical conductivity of the extract from the saturated soil. Furthermore, distribution and accumulation of ions in soil layers, plant organs and xylem sap were analyzed using an ion chromatograph. In this column experiment, diurnal and long term daily changes in water movement and ions accumulation in soil affected by characteristics of root absorption were evaluated. This can suggest that this column system is applicable for quantitative analyses of effects of root absorption of different crops on water deficit and salinization in soils, aiming at proposing a scientific method of the crop rotation for the environmentally conscious agriculture in semi-arid regions.

Original languageEnglish
Pages (from-to)543-547
Number of pages5
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume53
Issue number2
Publication statusPublished - Oct 2008

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

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    Urayama, K., Sakata, Y., Sonoda, Y., Ebihara, K., Sago, Y., Yoshikoshi, H., Araki, T., Yasutake, D., Cho, H., Kobayashi, T., & Kitano, M. (2008). Preliminary column experiment on dynamics of water and ion transport in soil affected by root absorption. Journal of the Faculty of Agriculture, Kyushu University, 53(2), 543-547.