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Radiation and Environmental Biophysics

, Volume 24, Issue 4, pp 287–301 | Cite as

Cesium and cobalt transfer from soil to vegetation on permanent pastures

  • Ute Boikat
  • Andrea Fink
  • J. Bleck-Neuhaus
Article

Summary

The Cs transfer from soil into pasture vegetation was investigated by using a variation of experimental conditions: (I) 67 pots with 7 kg soil from 3 marshy and 1 sandy site in the lower Weser region in Northwest Germany are used in a greenhouse with134CS under 8 different experimental procedures for 2 harvests; (II) 3 undisturbed 50 kg lysimeters were observed for137Cs and60Co transfer under outdoor conditions for 4 harvests, depth profiles of the activity were determined afterwards; (III) the transfer of the atmospheric fallout137Cs directly to the vegetation and from soil to vegetation after preventing its direct uptake by plastic covers was determined at 4 locations in the open pasture.

The experiments resulted in higher Cs transfer in the case of podzolic soil and/or direct injection of Cs solution into the rooting zone of old permanent pasture vegetation while the Cs transfer was about 2–4 fold lower when the radioactive solution was applied to newly sown grass. Transfer often decreases with increasing age of Cs in the soil. In addition, statistical analysis of the widely scattered data did not show significant results for the influence of type of marsh, experimental procedure, soil factors with pH of (4.5–6.1), organic carbon, amount of added Cs (microquantity), exchangeable, K, and total Ca.

Some figures are given for60Co. The observed transfer factors, combined from all experiments appear lognormally distributed with median values 0.22 on podzolic and 0.09 on marshy soils (Bq/kg fresh plant per Bq/kg air dried soil).

Keywords

Cobalt Cesium Depth Profile Direct Injection Transfer Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Ute Boikat
    • 1
  • Andrea Fink
    • 2
  • J. Bleck-Neuhaus
    • 3
  1. 1.Stuhr 2Federal Republic of Germany
  2. 2.Versuchs- und Beratungsring Ökologischer Landbau Niedersachsen e.V.FallingsbostelFederal Republic of Germany
  3. 3.Institut für PhysikUniversität BremenBremenFederal Republic of Germany

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