The uptake of radioactive strontium by crops under field conditions in the United Kingdom
Journal Article
·
· Journal of Agricultural Science
Field experiments are described in which the absorption of radioactive strontium by rye-grass and lucerne was investigated daring 1958 on five soil types which represent a range in exchangeable soil calcium content. Sr89 was applied as a spray to both arable land and to established pasture. Absorption was reduced by a factor of up to 4 in ryegrass following plowing to 11 in. compared with leaving the contamination on the soil surface. These results are compared with these obtained in an earlier series of experiments in 1957. The ratio of Sr89 to calcium was highest in crops grown on soil low in calcium. The addition of lime reduced absorption of Sr89 from the soil only when the exchangeable soil calcium content was relatively low. Some effect was observed in soils containing 7 to 8 meq calcium/ 100 g, a considerably larger one in a soil containing 2 meq. Only small differences occurred in the ratio of Sr/sup 89/ to calcium between lucerne and rye-grass. This comparison was not made beyond the first 6 months of growth. Experiments carried out with established pastures on four soil types indicate that Sr89 is more readily absorbed from the plant-base than after incorporation with soil. Plowing and reseeding may reduce the ratio of Sr89 to calcium in herbage by a factor of up to 4. This effect may be greater on mature swards. The liming of contaminated swards reduces the ratio of Sr89 to calcium in herbage by a factor of 2 to 3 regardless of the calcium content of the soil, and liming followed by plowing and reseeding by a factor of 3 to 7.
- Research Organization:
- Agricultural Research Council, Letcombe, Berks, Eng. and Compton, Berks, Eng.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-010672
- OSTI ID:
- 4090332
- Journal Information:
- Journal of Agricultural Science, Journal Name: Journal of Agricultural Science Journal Issue: 02 Vol. 55; ISSN applab; ISSN 0021-8596
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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