Factors relating to the suppressive effect of rice bran on Monochoria vaginalis in organic rice

2014 Fiscal Year Final Research Report

• Project/Area Number: 24580032
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Crop science/Weed science
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: UCHINO Akira 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター生産体系研究領域, 上席研究員 (20355316)
• Research Collaborator: NOZOE Takuhito 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター土壌肥料研究領域, 上席研究員 (20425581) ; AOKI Daisuke 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター生産体系研究領域, 契約研究員 ; MATSUOKA Hiroaki 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター生産体系研究領域, 契約研究員 ; MATSUSHIMA Ken-ichi 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター生産体系研究領域, 契約研究員
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 有機農業 / コナギ / 米ぬか / 水稲有機栽培

Outline of Final Research Achievements

Several factors relating to the suppressive effect of rice bran on Monochoria vaginalis in organic rice was investigated in order to know the factors to stabilize the suppressive effect in field conditions. Temperature of soil and seed dormancy has no apparent relationship to the suppressive effect. Analysis of soil solution revealed 3-phenylpropionic acid (3PPA) content was high in the soil where rice bran showed high suppressive effect, and 3PPA significantly suppressed seed germination of M. vaginalis in germination assay. However, 3PPA at the concentration seen in the field soil did not significantly suppress the seed germination.

Free Research Field

雑草科学