Volume 37, Number C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-569 - C1-572|
|Published online||14 October 2009|
Effect of fertilisation and drainage intensity on the foliar radiocaesium and potassium concentrations of Scots pine on a drained peatland
Finnish Forest Research Institute, METLA, Parkano Research Station, 39700 Pankano, Finland
2 Radiation and Nuclear Safety Authority, STUK, P.O. Box 14, 00881 Helsinki, Finland
This study aims at finding out the effects of fertilisation and drainage intensity on the needle 134Cs and 137Cs activity in Pinus sylvestris on a pine mire in Finland. The fertilisation treatments were as follows : a control, fertilised once in 1965 or fertilised twice in 1965 and 1977, with N, P and K. The potassium concentrations of the current year needles in 1990 showed severe potassium deficiency on the controls (K 3.6 mg g-1) and slight deficiency on the plots fertilised only once (K 4.2 mg g-1) but no deficiency on the plots fertilised twice (K 4.8 mg g-1). Fertilisation decreased the radiocaesium concentrations and amounts in the needles. The concentrations of 134Cs were 821 in the control, 442 in the single fertilisation and 485 Bq kg-1 in the repeated fertilisation treatment, and the 137Cs concentrations 5378, 2734 and 2104 Bq kg-1, respectively. Drainage intensity (10-100 m) had no significant effect on the needle K concentration or radiocaesium activity.
© EDP Sciences, 2002
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