rye etc were implanted by nitrogen or phoshorus ions with energy of 35 to 180keV. The effects on germination percentage
growth speed and plant type were investigated. In the observation of chromosomes
the characters of chromosomes were found normal in mitoses
but abnormal in some meioses. The distributions of implanted ions in seeds were measured by RBS andcalculated with TRIM program. The mechanism of biological effects induced by ion implantation and the prospect for application were discussed.