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Influence of development stage of spring oilseed rape and spring wheat on interception of wet-deposited radiocaesium and radiostrontium

Bengtsson, Stefan and Eriksson, Jan and Gärdenäs, Annemieke and Rosén, Klas (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
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Official URL: http://dx.doi.org/10.1016/j.atmosenv.2012.06.062

Abstract

The dry and wet deposition of radionuclides released into the atmosphere can be intercepted by vegetation in terrestrial ecosystems. The aim of this study was to quantify the interception of wet deposited 134Cs and 85Sr by spring oilseed rape (Brassíca napus L.) and spring wheat (Tríticum aestívum L.). The dependency of the intercepted fraction (f) on total above ground plant biomass, growing stage and the Leaf Area Index (LAI) was quantified. A trial was established in Uppsala (east central Sweden), with land management in accordance to common agricultural practices. The field trial was a randomised block design of 1 × 1 m2 parcels with three replicates. During the growing season of 2010, a rainfall simulator deposited 134Cs and 85Sr during six different growth stages. Two to 3 h after deposition, the biomass of the centre 25 × 25 cm2 area of each parcel was sampled and above ground biomass and LAI were measured. The radioactivity concentration and radioactivity of samples were measured by High Purity Germanium (HPGe)-detectors.

For 134Cs, there was a correlation between f and LAI (r2 = 0.55, p < 0.05) for spring wheat, but not for spring oilseed rape (r2 = 0.28, p > 0.05). For 85Sr, there was a correlation between f and LAI for both crops (r2 = 0.41, p < 0.05 for spring oilseed rape and r2 = 0.48 p, <0.05 for spring wheat). There was no correlation between f and above ground plant biomass in spring oilseed rape for either 134Cs (r2 = 0.01, p > 0.05) or for 85Sr (r2 = 0.11, p > 0.05). For spring wheat, there was a correlation for both 134Cs (r2 = 0.36, p < 0.05) and 85Sr (r2 = 0.32, p < 0.05). For spring oilseed rape, f was highest at growth stage ‘stem elongation’ for 134Cs (0.32 ± 0.22) and 85Sr (0.41 ± 0.29). For spring wheat, f was highest at growth stage ‘ripening’ for both radionuclides (134Cs was 0.36 ± 0.14 and 85Sr was 0.48 ± 0.18). Thus, LAI can be used to quantify interception of both radionuclides for both crops, whereas, above ground plant biomass is a weak measure of interception of wet deposited radiocaesium and radiostrontium.

Authors/Creators:Bengtsson, Stefan and Eriksson, Jan and Gärdenäs, Annemieke and Rosén, Klas
Title:Influence of development stage of spring oilseed rape and spring wheat on interception of wet-deposited radiocaesium and radiostrontium
Series/Journal:Atmospheric environment (1352-2310)
Year of publishing :December 2012
Volume:60
Page range:227-233
Publisher:Elsevier
ISSN:1352-2310
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:F Plant production > F40 Plant ecology
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
Keywords:Radionuclide, Deposition, Food crops, Biomass, Leaf Area Index, Growth stage
URN:NBN:urn:nbn:se:slu:epsilon-e-604
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-604
Additional ID:
Type of IDID
DOI10.1016/j.atmosenv.2012.06.062
ID Code:9012
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
External funders:Swedish Board of Agriculture and Swedish Radiation Safety Authority
Deposited By: Stefan Bengtsson
Deposited On:04 Sep 2012 13:16
Metadata Last Modified:02 Dec 2014 10:51

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