Influence of fertilizing on the 137Cs soil―plant transfer in a spruce forest of Southern Germany
2009
Abstract Fertilization with 2.5 t/ha limestone: (83% CaCO 3 , 8% MgO, 6% K 2 O, 3% P 2 O 5 ) reduces the 137 Cs transfer from spruce forest soil into plants like fern ( Dryopteris carthusiana ) and blackberry ( Rubus fruticosus ) by a factor of 2–5 during at least 11 years as measured by the aggregated transfer factor T ag . In 1997 and 2006 these results were confirmed by additional measurements of the 137 Cs transfer factor TF, related to the root zone (O h horizon), which were explained by the selective sorption of 137 Cs in the root zone by measurements of the Radiocaesium Interception Potential (RIP) in fertilized (RIP > 179 meq/kg) and non-fertilized soils (RIP
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