Water leakage control technique based on an acceleration response of a vibratory roller in a dry-seeded rice field

2015 Fiscal Year Final Research Report

• Project/Area Number: 25850175
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Agricultural environmental engineering/Agricultural information engineering
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: FUKAMI Koichiro 国立研究開発法人農業・食品産業技術総合研究機構, 九州沖縄農業研究センター・水田作研究領域, 主任研究員 (50399424)
• Co-Investigator(Renkei-kenkyūsha): MUKUNOKI Toshifumi 熊本大学, 自然科学研究科, 准教授 (30423651) ; NKANO Keiko 国立研究開発法人農業・食品産業技術総合研究機構, 九州沖縄農業研究センター・水田作研究領域, 主任研究員 (40354089) ; OKAYASU Takashi 九州大学, 大学院・農学研究院, 准教授 (70346831)
• Research Collaborator: MATSUO Naoki ; TSUCHIYA Shinori ; SASAKI Yutaka ; INABA Toshiki ; HIROMA Tatuo
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 水稲乾田直播 / 振動ローラ / 振動加速度 / 漏水防止 / 減水深 / 土壌構造 / X線CT解析

Outline of Final Research Achievements

The results of the present study demonstrated that water leakage from the field was sufficiently prevented when the soil moisture content was beyond the plastic limit before roller compaction. The shape of the soil pores that could efficiently prevent water leakage was flatter than that of the inefficiently compacted soil. In addition, the total porosity decreased, but the small-sized pore rate increased. On the other hand, the amplitude of the MFC in the vertical direction of the vibration acceleration of the roller was significantly increased with the decrease in the volume of water leakage. Thus, in addition to establishing the efficiency of vibratory rollers in reducing water leakage, our findings showed that it is possible to some extent to estimate the water leakage prevention effect from the acceleration response of a vibrating roller.

Free Research Field

農業食料工学