Potassium behavior and clay mineral composition in the soil with low effectiveness of potassium application

DOI Web Site 7 Citations 23 References
  • Katashi Kubo
    Agricultural Radiation Research Center, National Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research Center , Fukushima, Japan
  • Takashi Hirayama
    Department of Field Crops and Horticulture, Fukushima Agricultural Technology Centre , Fukushima, Japan
  • Shigeto Fujimura
    Agricultural Radiation Research Center, National Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research Center , Fukushima, Japan
  • Tetsuya Eguchi
    Agricultural Radiation Research Center, National Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research Center , Fukushima, Japan
  • Naoto Nihei
    Graduate School of Agricultural and Life Science, The University of Tokyo , Tokyo, Japan
  • Shoichiro Hamamoto
    Graduate School of Agricultural and Life Science, The University of Tokyo , Tokyo, Japan
  • Megumi Takeuchi
    Department of Field Crops and Horticulture, Fukushima Agricultural Technology Centre , Fukushima, Japan
  • Takashi Saito
    Department of Field Crops and Horticulture, Fukushima Agricultural Technology Centre , Fukushima, Japan
  • Takeshi Ota
    Agricultural Radiation Research Center, National Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research Center , Fukushima, Japan
  • Takuro Shinano
    Agricultural Radiation Research Center, National Agriculture and Food Research Organization (NARO) Tohoku Agricultural Research Center , Fukushima, Japan

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ABSTRACTIncreasing exchangeable potassium (ExK) content in soil to an appropriate level is important to mitigate the transfer of radioactive cesium to crops. We focused on a buckwheat (Fagopyrum esculentum Moench) field with a low ExK content, despite the application of K, in Fukushima Prefecture, Japan (Field A), following the Tokyo Electric Power Company Fukushima Dai-ichi (No. 1) Nuclear Power Plant accident in March 2011. We examined the relationship between K concentration and clay mineral composition in the soil of Field A and compared the findings with another field in Fukushima Prefecture (Field B) to clarify whether K applied to the soil was leached or remaining fixed. Pot experiments showed that K concentration in water seepage from pots following irrigation was significantly lower in pots from Field A than in those from Field B. Soil ExK content after soybean cultivation was lower in soils of Field A than those of Field B. These results indicate that K applied to Field A was fixed in the soil. ...

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