Home About Browse Search
Svenska


Interception and storage of wet deposited radionuclides in crops

field experiments and modelling

Bengtsson, Stefan B. (2013). Interception and storage of wet deposited radionuclides in crops. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2013:70
ISBN 978-91-576-7878-2
eISBN 978-91-576-7879-9
[Doctoral thesis]

[img]
Preview
PDF
5MB

Abstract

The emission of radionuclides into the atmosphere from various sources, such as nuclear power plant accidents and nuclear bomb explosions, can result in the interception and uptake of radionuclides by crops in the agricultural ecosystem. These radionuclides e.g. radiocaesium (¹³⁴, ¹³⁷Cs) and radiostrontium (⁸⁵, 90Sr), can be transferred to foodstuffs via seeds or animal feed.

Therefore, in this thesis, the goal was to study the amount of ¹³⁴Cs and ⁸⁵Sr that have been intercepted, taken-up and redistributed to different plant parts during wet deposition at different growth stages of spring oilseed rape, spring wheat and ley. For spring oilseed rape and spring wheat, the focus was on the transfer to the seeds after wet deposition of ¹³⁴Cs and ⁸⁵Sr. The dependence between the interception of radionuclides and the growth stage, e.g. the total standing plant biomass and the leaf area index (LAI) were also studied.

There was a positive correlation between the interception of ¹³⁴Cs and ⁸⁵Sr and LAI for all three crops. A positive correlation between the standing plant interception and the biomass of ¹³⁴Cs and ⁸⁵Sr was found for spring wheat and ley, but not for spring oilseed rape. The highest interceptions of ¹³⁴Cs and ⁸⁵Sr were at shooting for spring oilseed rape, and at maturity for spring wheat. For ley, the highest interception was at the well-developed stages.

Accumulation of ¹³⁴Cs and ⁸⁵Sr in the different plant parts increased when deposition was close to harvest and the crops accumulated more ¹³⁴Cs than ⁸⁵Sr. The concentration of ⁸⁵Sr was lower in spring oilseed rape than in wheat grains. There was an indication that the distribution of radionuclides between the above ground plant parts was independent of the way that they entered into the plant after deposition of ¹³⁴Cs and ⁸⁵Sr.

The variation in transfer factors found in this thesis in comparison with results from other studies suggest, that the estimate of the risk of possible uptake to crops in the event of future deposition during the growing season, is still subject to uncertainties.

Authors/Creators:Bengtsson, Stefan B.
Title:Interception and storage of wet deposited radionuclides in crops
Subtitle:field experiments and modelling
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :October 2013
Volume:2013:70
Number of Pages:74
Papers/manuscripts:
NumberReferences
I.Bengtsson, S.B., Eriksson, J., Gärdenäs, A.I., Rosén, K. (2012). Influence of development stage of spring oilseed rape and spring wheat on interception of wet-deposited radiocaesium and radiostrontium. Atmospheric Environment 60, 227-233.
II.Bengtsson, S.B., Eriksson, J., Gärdenäs, A.I., Vinichuk, M., Rosén, K. (2013). Accumulation of wet-deposited radiocaesium and radiostrontium in spring oilseed rape (Brássica napus L.) and spring wheat (Tríticum aestívum L.). Environmental Pollution 182, 335-342.
III.Bengtsson, S.B., Eriksson, J., Gärdenäs, A.I., Vinichuk, M., Rosén, K. Interception and absorption of wet-deposited radiocaesium and radiostrontium by a ley. (manuscript).
IV.Gärdenäs, A.I., Berglund, L.S., Bengtsson, S.B., Rosén, K. The uptake and storage of caesium and strontium by spring wheat - a modelling study based on a field experiment. (manuscript).
Place of Publication:Uppsala
Publisher:Institutionen för mark och miljö, Sveriges lantbruksuniversitet
ISBN for printed version:978-91-576-7878-2
ISBN for electronic version:978-91-576-7879-9
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F60 Plant physiology and biochemistry
T Pollution > T01 Pollution
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Agrovoc terms:food crops, brassica napus, triticum aestivum, plant developmental stages, biomass, caesium, strontium, radioisotopes, absorption, bioaccumulation, chemical composition, laboratory experimentation, models
Keywords:concentration, radionuclide, transfer factor, translocation factor, deposition, food crops, biomass, leaf area index, growth stage
URN:NBN:urn:nbn:se:slu:epsilon-e-1668
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1668
ID Code:10855
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: Stefan Bengtsson
Deposited On:17 Oct 2013 12:18
Metadata Last Modified:02 Dec 2014 11:03

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits