| The root uptake of 134 Cs by forage plants was studied as a function of growth stage and N fertilization with biotite supplementation.The study was conducted by means of pot experiments with peat soil. In the growth stage studies,ryegrass,white clover and yellow-flowered lucerne were cut once 30,60 or 90 days after sowing or three times at intervals of 30 days.In the one-cut system, at 90 d,the activity concentration of 134 Cs in ryegrass and clover was higher and that in lucerne lower than in the three-cut system.In both treatments,the activity concentration in ryegrass decreased and that in legumes,generally,tended to increase with time.In the N fertilization studies,ryegrass was grown at different levels of ammonium nitrate (100,200 and 400 mg N l -1... |
