Cs uptake by four plant species and Cs-K relations in the soil-plant system as affected by Ca(OH)2 application to an acid soil |
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Authors: | I. Massas V. Skarlou C. Haidouti F. Giannakopoulou |
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Affiliation: | Soil Science Laboratory, Department of Natural Resources Management and Agricultural Engineering, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece |
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Abstract: | Three rates of Ca(OH)2 were applied to an acid soil and the 134Cs uptake by radish, cucumber, soybean and sunflower plants was studied. The 134Cs concentration in all plant species was reduced from 1.6-fold in the sunflower seeds to 6-fold in the soybean vegetative parts at the higher Ca(OH)2 rate. Potassium (K) concentration in plants was also reduced, but less effectively. The significantly decreased 134Cs-K soil to plant distribution factors (D.F.) clearly suggest a stronger effect of soil liming on 134Cs than on K plant uptake. This observation was discussed in terms of ionic interactions in the soil matrix and within the plants. The results also indicated that the increased Ca2+ concentration in the exchange phase and in the soil solution along with the improved root activity, due to the soil liming, enhanced the immobilization of 134Cs in the soil matrix and consequently lowered the 134Cs availability for plant uptake. |
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Keywords: | Cesium Liming Soil Plant Uptake Calcium Potassium |
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