Development of surface roots of soybean under waterlogged soil condition

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K05998
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 39020:Crop production science-related
• Research Institution: Kyushu University
• Principal Investigator: Abiko Tomomi 九州大学, 農学研究院, 助教 (00743882)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: ダイズ / 耐湿性 / 土壌中の溶存酸素欠乏

Outline of Final Research Achievements

In this study, we focused on the surface root development of soybean under waterlogged condition,and investigated 1) growth and surface root development of soybean in waterlogged field after heavy rainfall, and 2) selection of cultivars that develop surface roots under waterlogged soil conditions and its mechanism. In 2021, heavy rainfall in the Kyushu region caused wet damage due to waterlogging and flooding. The similar situation was occurred in the test field, and it was observed that waterlogging caused the development of surface roots. In addition, soybean core-collection were evaluated for surface root development under waterlogged soil condition, there was a clear difference among the cultivars.

Free Research Field

作物生産科学

Academic Significance and Societal Importance of the Research Achievements

日本で栽培されているダイズの約８割は水田転換畑で栽培されている. 水田転換畑での栽培は降雨により土壌水分が過剰となり, 耐湿性の低いダイズは被害をしばしば受ける.ダイズの耐湿性には複数の関連形質があるが, そのうちのひとつ, 地表根について明らかにすることは生産現場での湿害の軽減につながる可能性がある.