本试验在液氮、干冰、高温和氮气等不同外界条件下照射春小麦干种子,研究其对不同条件、不同剂量的辐射敏感性和诱变效应。根据苗高、根长等数据和含微核的细胞数以及田间生长等各项指标的结果表明:本试验所采用的几种方法在不同程度上都有减轻辐射生理损伤、增加突变频率的作用,其中液氮条件下处理效果较好,其次氮气、高温和干冰;适宜剂量是γ2.0万拉特和3.0万拉特。 In this experiment, dry seeds of spring wheat were irradiated under different external conditions, such as liquid nitrogen, dry ice, high temperature and nitrogen, to study their radiation sensitivity and mutagenic effects on different conditions and doses. According to the data of seedling height and root length, the number of cells containing micronuclei and the growth of the field, the results showed that the methods used in this study all reduced the radiation physiological damage and increased the mutation frequency to varying degrees , Of which liquid nitrogen treatment is better, followed by nitrogen, high temperature and dry ice; the appropriate dose is γ2.0 Wanrat and 3.0 万 拉特.