硒 (Se)对降低水稻重金属Pb ,Cd ,Cr污染的研究

Studies on the Pole of Selenium (Se) in Decreasing Pb,Cd and Cr Pollution to Rice

检测湖南省不同地域 82份大米中的Pb平均含量为 0 2 88mg/kg ,Cd平均含量为0 0 85mg/kg ,Cr平均含量为 0 1155mg/kg .水稻补施低浓度的Se可降低大米中Pb ,Cd ,Cr等重金属的含量 ,早籼稻施Se效果大于杂交晚稻 ,但品种不同降低幅度不同 .

Examination to 82 samples of different variety rice grains collected from different districts of Hunan Province showed the average content of heavy metal Pb,Cd and Cr in them is 0 288,0 085 and 0 115?mg/kg respectively.When low concentration of Se was applied to rice plants,the quantity of Pb,Cd and Cr in grains could be lowered,though the range was different among varieties.Se had the better effect on indica early rice than hybrid late combinations.