Effect of High Temperature Soil Sterilization on Surface Soil Structure and Transport Properties

• Project/Area Number: 25450355
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Rural environmental engineering/Planning
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Saito Hirotaka 東京農工大学, (連合)農学研究科(研究院), 准教授 (70447514)
• Co-Investigator(Kenkyū-buntansha): KOHGO Yuji 東京農工大学, 大学院農学研究院, 教授 (30414452)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 土壌物理性 / 温度依存性 / 団粒構造 / 土壌診断 / 地中レーダー / GPR / 熱水消毒 / 土壌消毒 / 土壌構造 / 土中水・熱同時移動 / 熱水

Outline of Final Research Achievements

In this study, we investigate the effect of temperature on aggregate stability of upland strongly aggregated volcanic ash soils. Results showed that aggregate stability decreases with temperature for larger aggregates, while elution of binding agents, polysaccharides, increases with temperature for stable smaller aggregates. We also developed an integrative soil evaluation approach based upon soil physical properties using radar charts to evaluate the effect of temperature. A non-destructive method to visualize infiltration processes of hot water in field soils using array ground penetrating radar was tested and their effectiveness was confirmed.

Research Products

• [Journal Article] Monitoring Infiltration Process Seamlessly Using Array Ground Penetrating Radar (2016)
  • Author(s): Iwasaki, T., Kuroda, S., Saito, H., Tobe, Y., Suzuki, K., Fujimaki, H., and Inoue, M.
  • Journal Title: Agricultural and Environmental Letters Volume: 1 Issue: 1 Pages: 1-4
  • DOI: 10.2134/ael2016.01.0002
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 熱応答試験実施時間の短縮がみかけ熱伝導率推定に与える影響: 数値的研究 (2014)
  • Author(s): 斎藤広隆・斎藤健志・向後雄二・濱本昌一郎・Per Moldrup・小松登志子
  • Journal Title: 土壌の物理性 Volume: 128 Pages: 11-20
  • Peer Reviewed
• [Presentation] Monitoring water infiltration in aggregated volcanic ash soil using multi-offset GPR (2015)
  • Author(s): Iwasaki, T., Saito, H., and Kuroda, S
  • Organizer: 2015 AGU Fall Meeting
  • Place of Presentation: サンフランシスコ，アメリカ合衆国
  • Year and Date: 2015-12-14
  • Int'l Joint Research
• [Presentation] Temperature Effect on Aggregate Stability of Volcanic Ash Soils (2015)
  • Author(s): Sekiguchi, R., Kohgo, Y., and Saito, H.
  • Organizer: 2015 ASA-CSSA-SSSA Annual Meeting
  • Place of Presentation: ミネアポリス，アメリカ合衆国
  • Year and Date: 2015-11-15
  • Int'l Joint Research
• [Presentation] 物理性を指標とした中山間条件不利農地の土壌評価 (2015)
  • Author(s): 百瀬みずき・笹倉萌子・中島正裕・斎藤広隆
  • Organizer: 平成27年度 農業農村工学会大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2015-09-01
• [Presentation] Effect of hot water soil sterilization on soil physical properties of aggregated volcanic ash soils (2015)
  • Author(s): Rando Sekiguchi, Yuji Kohgo, and Hirotaka Saito
  • Organizer: 1st International Conference on Asian Highland Natural Resources Management
  • Place of Presentation: Chiang Mai, Thailand
  • Year and Date: 2015-01-07 – 2015-01-09
• [Presentation] Determination of the Tangential Model Soil Water Retention Curves for Various Soil Types (2014)
  • Author(s): Thiam, M., Y. Kohgo, and H. Saito
  • Organizer: 2014 ASA-CSSA-SSSA International Annual Meeting
  • Place of Presentation: Long Beach, USA
  • Year and Date: 2014-11-02 – 2014-11-05
• [Presentation] Effect of land use change on soil physical properties of disadvantageous cultivated areas (2014)
  • Author(s): Momose, M., M. Nakajima, and H. Saito
  • Organizer: 20th World Congress of Soil Science
  • Place of Presentation: Jeju, Korea
  • Year and Date: 2014-06-08 – 2014-06-13