ACCUMULATION OF Cs AND K AND GROWTH OF BEAN PLANT IN NUTRIENT SOLUTION AND SOILS
Technical Report
·
OSTI ID:4801163
Bean plants were grown to maturity in nutrient solutions and soils to study the influence of Cs and K on the growth and uptake of K, Cs/sup 137/, and stable Cs. The application of K to Cs/sup 137/-treated soils relatively high in exchangeable K had only slight effect on the plant uptake of Cs/sup 137/. Increasing additions of K to Cs/sup 137/-treated nutrient solution decreased the uptake of Cs/sup 137/. In both soils and nutrient solutions, the application of K increased the K uptake by plants. Small applications of stable Cs to contaminated soils and nutrient solutions caused a greatly increased Cs/sup 137/ uptake by plants, presumably a carricr effect. Large applications of Cs reduced the uptake of Cs/sup 137/ because of isotopic dilution. Up to a certain threshold level, the plant uptake of K increased with that of stable Cs and appeared to be partly non-competitive with Cs. Bean plants discriminated against Cs. The discrimination between Cs and K varied with K and Cs concentration in the nutrient media. Cesium was toxic to bean plants. This toxic effect was alleviated to some extent by increasing the application of K. In the soils studied, reduction in plant yields occurred when the application of Cs was greater than 8% of the soil cation exchange capacity. (auth)
- Research Organization:
- California. Univ., Los Angeles. School of Medicine. Lab. of Nuclear Medicine and Radiation Biology
- NSA Number:
- NSA-16-011399
- OSTI ID:
- 4801163
- Report Number(s):
- TID-15044
- Country of Publication:
- United States
- Language:
- English
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