本文以不同剂量的~（６０）Ｃ。－ｒ射线照射六个不同禾本科牧草、结果显著抑制了幼芽、根的生长并降低了活力。通过对适宜辐射剂量的初步预测得知不同属的禾草对辐射的敏感性差异很大，同一属内不同种间的耐辐射程度也有差异而且野生种和引进种也有差异。 In this paper, different doses of ~ (60) C. Irradiated with six different grasses, the results showed that the growth of shoots and roots was significantly inhibited and the viability was reduced. Through the preliminary forecast of suitable radiation dose, it is found that the sensitivity of different genera of grass to radiation is quite different. The radiation tolerance of different species in the same genus is also different, and there are also differences between wild species and introduced species.