湖北省早稻主栽品种中镉含量差异性研究

Differences in Cadmium Contents of Main Cultivated Early Rice Varieties in Hubei Province

为了解湖北省早稻镉污染情况,以湖北省主要种植的31个早稻品种(包括19个常规稻,9个三系杂交稻,3个两系杂交稻)为研究对象,通过对839份稻米样品的镉含量进行检测,分析不同早稻品种镉含量的差异性。结果表明,湖北省早稻镉超标率为6.3%,低于全国平均水平;常规稻的镉含量明显高于杂交稻(P=0.031);湖北省种植面积较大的早稻品种是两优287、金优402和鄂早18,金优402对应样品镉超标率为1.2%,其余2个品种超标率分别为4.0%和6.5%。

Through determination on cadmium contents of 839 early rice samples of 31 main cultivated rice varieties in Hubei Province, the difference in cadmium contents of different varieties and different types were analyzed. The results showed that the overstandard rate of early rice samples in Hubei was 6.3%, which was lower than the national average level. The cadmium contents of conventional rice were higher than that of hybrid rice. The most widely planted varieties were Liangyou 287, Jinyou 402 and Ezao 18. The over-standard rate of Jinyou 402 was 1.2%, Liangyou 287 was 6.5% and Ezao 18 was 4.0%.