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Soil to plant halogens transfer studies - 2. Root uptake of radiochlorine by plants.

V.Kashparov (a),C.Colle (b,) ,S.Zvarich (a),V.Yoschenk (a), S.Levchuk(a) ,S.Lundin (a)

Journal of Environmental Radioactivity 79; 233-253

Document type > *Article de revue

Keywords > concentration ratio, iodine, radioecology, soil

Research Unit > IRSN/DEI/SECRE/LRE

Authors > COLLE Claude

Publication Date > 06/01/2005

Summary

Long-term field experiments have been carried out in the Chernobyl exclusion zone in order to determine the parameters governing radiochlorine ( 36 Cl)transfer to plants from four types of soil,namely,podzoluvisol,greyzem,and typical and meadow chernozem. Radiochlorine concentration ratios (CR) in radish roots (15 +/-10) ,lettuce leaves (30 +/-15) ,bean pods (15 +/- 11) and wheat seed (23 +/-11)  and straw (210 +/-110) for fresh weight of plants were obtained.These values correlate well with stable chlorine values for the same plants.One year after injection, 36 Cl reached a quasi-equilibrium with stable chlorine in the agricultural soils and its behavior in the soil .plant system mimicked the behavior of stable chlorine (this behavior was determined by soil moisture transport in the investigated soils). In the absence of intensive vertical migration,more than half of 36 Cl activity in arable layer of soil passes into the radish,lettuce and the aboveground parts of wheat during a single vegetation period.

(a) Ukrainian Institute of Agricultural Radiology (UIAR),Mashinostroiteley Str.7, Chabany,Kiev Region 08162,Ukraine

(b) Institute for Radioprotection and Nuclear Safety (IRSN/DEI/SECRE),Cadarache bat 159, BP 3,13115 Saint Paul-Lez-Durance,France

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