title: Relationship between the radiocesium interception potential and the transfer of radiocesium from soil to soybean cultivated in 2011 in Fukushima Prefecture, Japan.
abstract: The concentration of radiocesium ((134)Cs and (137)Cs) in agricultural fields around Fukushima Dai-ichi Nuclear Power Plant (FDNPP) was elevated after the accident in March 2011. Evaluation of soil properties that influence phytoavailability of radiocesium is important for optimal soil management to minimize radiocesium transfer to crops. In this study, soybean grain and soil samples (0-15 cm) were collected from 46 locations in Fukushima Prefecture in 2011, and (137)Cs concentrations were measured. (137)Cs concentration ranges were 11-329 Bq kg(-1)-dry in soybean grain samples, and 0.29-2.49 kBq kg(-1)-dry in soil samples. The radiocesium interception potential (RIP) values in the soil samples ranged from 0.30 to 8.61 mol kg(-1). RIP negatively correlated with total carbon content and oxalate-extractable Si and Al + 1/2 Fe in the soils, suggesting that soils rich in organic matter and poorly crystalline clays tended to have lower RIP in this region. The soil-to-plant transfer factor for (137)Cs, analyzed in relation with various soil characteristics, varied by two orders of magnitude and was significantly negatively correlated with RIP and exchangeable K concentration in soil. The results show that RIP is useful for evaluating the efficiency of radiocesium transfer from soil to plants in this region.
authors.affiliation: Institute for Environmental Sciences, 1-7 Ienomae, Obuchi, Rokkasho-mura, Kamikita-gun, Aomori 039-3212, Japan. Electronic address: takeda@ies.or.jp.
authors.forename: Akira
authors.initials: A
authors.lastname: Takeda
authors.affiliation: Institute for Environmental Sciences, 1-7 Ienomae, Obuchi, Rokkasho-mura, Kamikita-gun, Aomori 039-3212, Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Tsukada
authors.affiliation: National Institute for Agro-Environmental Sciences, 3-1-3 Kan-nondai, Tsukuba, Ibaraki 305-8604, Japan.
authors.forename: Noriko
authors.initials: N
authors.lastname: Yamaguchi
authors.affiliation: Fukushima Agricultural Technology Center, 116 Shimonakamichi, Takakura, Hiwada-Machi, Koriyama, Fukushima 963-0531, Japan.
authors.forename: Megumi
authors.initials: M
authors.lastname: Takeuchi
authors.affiliation: Fukushima Agricultural Technology Center, 116 Shimonakamichi, Takakura, Hiwada-Machi, Koriyama, Fukushima 963-0531, Japan.
authors.forename: Mutsuto
authors.initials: M
authors.lastname: Sato
authors.affiliation: Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, 1-5 Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nakao
authors.affiliation: Institute for Environmental Sciences, 1-7 Ienomae, Obuchi, Rokkasho-mura, Kamikita-gun, Aomori 039-3212, Japan.
authors.forename: Shun'ichi
authors.initials: S
authors.lastname: Hisamatsu
mesh_terms: D002586:Cesium / Q000032:analysis / Q000378:metabolism*; D002588:Cesium Radioisotopes / Q000032:analysis / Q000378:metabolism; D062406:Fukushima Nuclear Accident; D011834:Radiation Monitoring; D012621:Seasons; D012990:Soil Pollutants, Radioactive / Q000032:analysis / Q000378:metabolism*; D013025:Glycine max / Q000378:metabolism*
chemical_list: D002588:Cesium Radioisotopes; D012990:Soil Pollutants, Radioactive; D002586:Cesium
keywords: (137)Cs; Exchangeable K; RIP; Transfer factor