Abstract: Effects of iodine with diferent adding manner8 on radish sprouts in culture solution was studied．The results showed that the growth of the root，at iodine concentration of 0.5—1.5 mg/L，was restrained ，while the content of vitamin C， total free amino acid and fibre content in edible parts of radish sprouts were increased．the concentration exceeded 1.5 mg/L, the beneficial efects of iodine diminished even changed into toxic elfects．The iodine content in edible parts of sprouts mised up significantly with the increasing of the concentration of iodine in culturing solution．There existed significant diferences among varieties and between iodine adding n'ifllmer．

Key words: Iodine, Radish sprouts, Amino acid, Vitamin C, Fibre