134Cs 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.
Three rates of Ca(OH)(2) were applied to an acid soil and the (134)Cs uptake by radish, cucumber, soybean and sunflower plants was studied. The (134)Cs 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 (134)Cs-K soil to plant distribution factors (D.F.) clearly suggest a stronger effect of soil liming on (134)Cs 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 Ca(2+) 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 (134)Cs in the soil matrix and consequently lowered the (134)Cs availability for plant uptake.
Massas
I
I
Soil Science Laboratory, Department of Natural Resources Management and Agricultural Engineering, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece. massas@aua.gr
Skarlou
V
V
Haidouti
C
C
Giannakopoulou
F
F
D001682:Biological Availability; D002126:Calcium Hydroxide / Q000494:pharmacology; D002586:Cesium / Q000032:analysis; D002588:Cesium Radioisotopes / Q000302:isolation & purification* / Q000378:metabolism; D002712:Chlorides / Q000032:analysis; D018553:Cucumis sativus / Q000737:chemistry / Q000378:metabolism; D006368:Helianthus / Q000737:chemistry / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D010944:Plants / Q000737:chemistry*; D031224:Raphanus / Q000737:chemistry / Q000378:metabolism; D012639:Seeds / Q000378:metabolism; D012987:Soil / Q000032:analysis*; D013025:Glycine max / Q000737:chemistry / Q000378:metabolism; D014675:Vegetables / Q000378:metabolism
D002588:Cesium Radioisotopes; D002712:Chlorides; D012987:Soil; D002586:Cesium; C028019:cesium chloride; D002126:Calcium Hydroxide