Studies on plant accumulation of fission products under Swedish conditions. XIV. Uptake of $sup 137$Cs by wheat and timothy from six different soils as influenced by rate of K-fertilization and by type and rate of N-fertilization in pot experiments

Technical Report · Mon Oct 01 04:00:00 EDT 1973

OSTI ID:4935354

Haak, E; Eriksson, A

The influence of K and N fertilization on the uptake of /sup 137/Cs by wheat and timothy grass was studied in pot experiments with 6 soils of different texture and potassium contents. Three rates of K application were combined with three types of N fertilizer (calcium nitrate, ammonium nitrate, and urea) each of which was applied atthree rates. The effect of prolonged cropping was also studied. It was found that the soil quality and the uptake of K mainly determined the uptake of /sup 137/Cs at low K and N rates. The concentration of / sup 137/Cs in the crops was negatively related to the contents of clay and K. K fertilization reduced the uptake of /sup 137/Cs considerably. This effect decreased, however, with increased contents of clay and K. The effect of N fertilization was dependent on the ype of N fertilizer, N rate, and K level. While increased application of calcium nitrate slightly decreased the /sup 137/Cs content in the plant, increased application of ammonium nitrate or urea highly increased it. Both effects decreased with increased K rate and with increased conteats of clay and K in the soil. Prolonged cropping resulted in higher /sup 137/Cs content in the plant on soils with low contents of clay and K, while the reverse was the case on soils with high contents of clay and K. (SW)

• Research Organization: Foersvarets Forskningsanstalt, Stockholm (Sweden)
• Sponsoring Organization: Sponsor not identified
• NSA Number: NSA-29-010495
• OSTI ID: 4935354
• Report Number(s): FOA--4-4557-A-3
• Country of Publication: Sweden
• Language: English

Related Subjects

CESIUM 137
CLAYS
FALLOUT
FERTILIZERS
GRASS
N44340 --Environmental & Earth Sciences--Radioactivity Monitoring & Transport--Ecosystems & Food Cycles
N48730* --Life Sciences--Nuclide Kinetics & Toxicology-- Plants
NITROGEN
POTASSIUM
RADIOECOLOGICAL CONCENTRATION
RADIONUCLIDE KINETICS
RADIONUCLIDE MIGRATION
ROOT ABSORPTION
SOILS
SWEDEN
UPTAKE
VARIATIONS
WHEAT