Fig.1　Effect of radioactive cesium in surface water of paddy field on brown rice

Reference：”Cause of Appearing Rice with High Radioactive Cesium Concentration and Its Countermeasures” Outline, second edition (Ministry of Agriculture, Forestry and Fisheries)

• Pot-tests have revealed that the concentration of ¹³⁷Cs in brown rice does not increase so much, even when water containing 1.0 Bq/L ¹³⁷Cs in dissolved state continuously flows into paddy fields through the cropping season.
• The effect of water in river and dam lakes is low.

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Reference

1. 農林水産省ほか, “放射性セシウム濃度の高い米が発生する要因とその対策について; 要因解析調査と試験栽培等の結果の取りまとめ （概要第2版）”, 2014-03, 25p.
2. 長尾ほか(2019), 福島における放射性セシウムの環境動態研究の現状（平成30年度版）, JAEA-Research 2019-002, 235p.