2026-03-14T12:43:39Z https://repository.naro.go.jp/oai

oai:repository.naro.go.jp:02001672 2026-01-30T05:02:27Z 1706970004180:1 87:661:1727312983899:1727312636636:1766559045470

水稲減収尺度の策定のための実水田圃場内に清水・濁水区を設けた模擬冠水試験－試験手法の提案と生育概況調査－ A Pseudo-flooding Experiment under Real Inundation Conditions by Using Clean and Turbid Water Plots to Formulate Reduction Scales in Rice Yield － Design of the Experimental Plots and Investigation of Growth Conditions － MINAKAWA, Hiroki 皆川, 裕樹 ミナカワ, ヒロキ MASUMOTO, Takao 増本, 隆夫 マスモト, タカオ HORIKAWA, Naoki 堀川, 直紀 ホリカワ, ナオキ YOSHIDA, Takeo 吉田, 武郎 ヨシダ, タケオ KUDO, Ryoji 工藤, 亮治 クドウ, リョウジ KITAGAWA, Iwao 北川, 巌 キタガワ, イワオ ZUKEMURA, Chika 瑞慶村, 知佳 ズケムラ, チカ We describe a methodology for a pseudo-flooding experiment to quantify the effect of inundation on rice yield. For the experiment, we chose the popular Japanese rice cultivar Koshihikari. The experimental arena was constructed in a rice paddy and consisted of two zones, one in which the rice was cultivated as usual with the usual water levels, and a flood zone, which was used for submerging the rice plants. The flood zone, which was designed to reproduce real flood disaster conditions in a paddy field, can be filled to a depth of 0.3, 0.6 or 0.9 m above ground level, and in addition it is divided into two plots, a clean water and a turbid water part. Thus, the experimental conditions can vary according to （1） the development stage of the rice, （2） complete or incomplete submersion, （3） clean or turbid water, and（ 4） duration of submersion. As a result, we showed that the booting stage of rice development was particularly vulnerable to complete submergence： the dominant effects were changes in morphological characters such as leaf drying and increased numbers of stems and ears, as well as a drastic reduction in yield. In contrast, rice plants submerged incompletely at this stage showed resistance to submersion. Thus, one action that can be taken to reduce flood damage might be to keep the leaf tips above the water surface. 独立行政法人 農業・食品産業技術総合研究機構 農村工学研究所 National Agriculture and Food Research Organization, National Institute for Rural Engineering 2013-03-28 jpn departmental bulletin paper https://doi.org/10.24514/0002001672 https://repository.naro.go.jp/records/2001672 10.24514/0002001672 1882-3289 農村工学研究所技報 Technical report of the National Institute for Rural Engineering 214 111 121 https://repository.naro.go.jp/record/2001672/files/TRNIREJ214_111-121.pdf application/pdf 18.3 MB 2026-01-15