Studies on plant accumulation of fission products under Swedish conditions. XV. Uptake of $sup 137$Cs by wheat as influenced by type and rate of N- fertilization under field conditions

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

OSTI ID:4935355

Haak, E; Eriksson, A

The influence of N-fertilization on the uptake of /sup 137/Cs by wheat was studied for four years in a micro plot experiment with two clay and one sandy soil, all on a sandy subsoil. Calcium nitrate, onium nitrate, and urea were applied to the seedbed yearly at three rates. The soil quality of the plough layer mainly determined the uptake of /sup 137/ Cs by the wheat crop. The /sup 137/Cs concentration in the plant was several times higher on sandy soil than on clay soils. It varied considerably from year to year on all the three soils, most centainly depending on the differences in the root activities in the soil profile caused by different amounts and distribution of precipitation during the growth periods. Because of this variation, continued cropping is needed for a reliable determination of the changes in the plant availabiliiy of /sup 137/Cs under field conditions. The N-type and the N-rate influenced the /sup 137/Cs uptake and was of practical significance on the sandy soil. On this soil the / sup 137/Cs concentration in the plant increased with the N-rate and was usually higher for ammonium nitrate and urea than for calcium nitrate. The /sup 137/Cs concentration was usually much lower in the grain than in the straw but the difference varied between soils and between years. (SW)

• Research Organization: Foersvarets Forskningsanstalt, Stockholm (Sweden)
• Sponsoring Organization: Sponsor not identified
• NSA Number: NSA-29-010496
• OSTI ID: 4935355
• Report Number(s): FOA--4-4559-A-3
• Country of Publication: Sweden
• Language: English

Related Subjects

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