title: Interception and transfer of wet-deposited (134)Cs to potato foliage and tubers.
abstract: Contamination levels on potato foliage and tubers were investigated by repeated sampling after multiple foliar contaminations of wet-deposited (134)Cs at five different growth stages in a micro-plot field experiment in three successive years. Application of the radionuclide early in the growing season (deposition date 19-27 June, growth stage II = plant establishment) resulted in low (134)Cs activity concentration in potato tubers across sampling occasions (mean 60, 25 and 115 Bq kg(-1) dry weight (D.W.) for years 1, 2 and 3, respectively). Following radionuclide deposition in the middle of the growing season (15-24 July, growth stage III = tuber initiation), (134)Cs activity concentration in tubers across sampling occasions was found to be highest (mean 150, 850 and 660 Bq kg(-1) D.W. for years 1, 2 and 3, respectively). When the radionuclide was sprayed on at later stages (5-7 August, growth stage IV = tuber bulking), (134)Cs activity concentrations in tubers across sampling dates decreased (mean 75, 310 and 395 Bq kg(-1) D.W. for years 1, 2 and 3, respectively). Deposition in the second half of August (15-28 August, late growth stage IV and beginning of growth stage V = tuber maturation) resulted in yet lower (134)Cs activity concentration in tubers. Potato tubers may concentrate as much as up to 2 times more (134)Cs than foliage depending on deposition date of radionuclide.
authors.affiliation: Department of Soil and Environment, Swedish University of Agricultural Sciences, SLU, Box 7014, SE-75007, Uppsala, Sweden.
authors.forename: K
authors.initials: K
authors.lastname: Rosén
authors.affiliation: Department of Ecology, Zhytomyr State Technological University, 103 Chernyakhovsky Str., 10005, Zhytomyr, Ukraine. Electronic address: Mykhailo.Vinichuk@slu.se.
authors.forename: M
authors.initials: M
authors.lastname: Vinichuk
mesh_terms: D000396:Air Pollutants, Radioactive / Q000378:metabolism*; D002588:Cesium Radioisotopes / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D035281:Plant Tubers / Q000378:metabolism; D011834:Radiation Monitoring; D011891:Rain; D012621:Seasons; D011198:Solanum tuberosum / Q000254:growth & development / Q000378:metabolism*; D013548:Sweden
chemical_list: D000396:Air Pollutants, Radioactive; D002588:Cesium Radioisotopes
keywords: Deposition; Foliage; Potatoes; Radiocesium; Tubers