用赤霉菌（Ｆｕｓａｒｉｕｍｇｒａｍｉｎｅａｒｕｍ）病麦粒水浸滤液、蔡氏（Ｃｚａｐｅｋ）液体培养滤液及马铃薯液体培养滤波处理小麦不同抗性品种的萌动种子，测定其胚根、胚芽生长长度．结果表明，三种培养滤液体积分数大时可抑制根、芽生长，体积分数小时则促进其生长，具双重生物效应．Ｔ－２毒素仅具抑制效应．病菌滤液和纯毒素均可用于鉴定小麦品种抗赤霉病性． The germinating seeds of different wheat cultivars were treated with Fusarium graminearum wort leachate, Czapek liquid culture filtrate and potato liquid culture filter, and the radicle growth and embryo growth length were measured. The results showed that when the volume fraction of the three kinds of culture filtrates was large, the growth of roots and shoots could be inhibited. When the volume fraction was small, the growth was promoted and had a dual biological effect. T-2 toxin has only a suppressive effect. Bacterial filtrate and pure toxin can be used to identify the wheat varieties resistant to Fusarium head blight.