小麦黑麦和油菜幼苗对稀土富集迁移规律的研究  

Bioaccumulation and Transformation of Rare-Earth Lanthanum in Wheat (Troticum aestivum L.),Rye(Secale Cereale L.)and Rape(Brassica rapa L.)Seedlings

作　　者：胡忻[1] 陈逸君[2] 戴乐美[2] 王晓蓉[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院江苏南京210093 [2]南京大学现代分析中心

出　　处：《农业环境保护》2002年第2期97-99,共3页Agro-Environmental Protection

基　　金：江苏省自然科学基金(BK990340);国家自然科学基金(29890280-1)资助

摘　　要：选择小麦(troticumaestivumL.)、黑麦(SecaleCerealeL.)、油菜(BrassicarapaL.)作为试验作物,研究其对稀土镧迁移累积的时间效应和浓度效应。结果表明:(1)镧能在3种作物中迅速累积。随着试验液镧浓度的增加,作物中镧的积累量也增加,但与镧的暴露浓度不呈线性相关性。(2)积累效应主要发生于暴露早期。随着暴露的延长,作物体内的镧含量逐渐稳定。(3)镧在3种作物中的积累具有明显的种属特异性。镧积累量油菜远高于小麦和黑麦,但3种作物的茎叶和根中的镧积累量的比值差异较大,其中小麦远高于其它两种作物,表明小麦对镧的输送作用比其他两种作物强。Wheat ( Troticum aestivum L.), rye(Secale Cereale L.)and rape(Brassica rapa L.)were selected as test plants to study bioaccumulation and transformation of rare earth lanthanum under exposure of time and concentration. The results showed: (1) Lanthanum could be accumulated in three crops very rapid.The content of La in three crops increased with the enhancement of La in test solution, although it didn't show linear correlation with the addition of La.(2) The accumulation mainly occurred in forepart exposure. With the exposure going on, the concentration of La in the plants became constant.(3) The accumulation ofLa in the crops had obviously generic speciality. The difference of La concentration in three crops was very significantly. The ratio of La in shoot and root for the three crops showed that wheat was higher than the rest two, while the accumulation of La in shoots of wheat was much more liable than that in the rest two.

关 键 词：小麦 黑麦 幼苗 稀土富集迁移规律 油菜 作物监测 

分 类 号：X835[环境科学与工程—环境工程]