Cd、Pb污染对油菜种子萌发及幼苗生物量的影响  

Effect of Cadmium,Lead Pollutionon on Seed Germination and Biomass of Rape

作　　者：鲁先文[1] 丁时和[1] 

机构地区：[1]淮南师范学院生命科学系,安徽淮南232038

出　　处：《中国农学通报》2011年第6期124-127,共4页Chinese Agricultural Science Bulletin

基　　金：安徽省教育厅科研项目"用植物抗氧化系统评价重金属对小麦幼苗的污染与毒性"(KJ2007B341ZC);"模拟酸雨和重金属离子单一几复合胁迫对油菜幼苗生长和抗氧化酶活性影响的研究"(KJ2009B267Z)

摘　　要：笔者采用砂基培养方法研究了镉(Cd)、铅(Pb)及其复合污染对油菜种子萌发及幼苗生物量的影响。结果表明:低浓度的Cd2+(≤5mg/kg)、Pb2+(≤5mg/kg)单一处理及Cd2+、Pb2+(1mg/kg+5mg/kg)复合处理对油菜种子发芽率、发芽势等有一定的促进作用;随着处理浓度的提高,Pb2+单一及复合处理对活力指数、苗长及植株鲜重具有抑制作用,并且随着处理浓度的增加其抑制作用逐渐上升。复合处理对油菜种子萌发和幼苗生物量的毒性最大,其次是Cd2+单一处理,最小的是Pb2+单一处理。The effects of cadmium,lead and their combined pollution on seed germination and biomass of rape were studied by sand culture method. The results showed that the single pollution of Cd2＋ was capable to stimulate the germination percentage（GP） ,germination energy（GE） and the biomass of rape at lower concentration. The single pollution of Pb2 ＋ were capable to stimulate the germination percentage（GP） and germination energy（GE） at lower concentration. These indexes reduced gradually at higher concentration. Under the condition of combined pollution,they were capable to stimulate the germination energy（GE） ,germination index（GI） and the novel weight of root at lower concentration,but the vigor index（VI） were inhibited obviously as the increase of their combined concentration. Under the condition of Pb2 ＋ and their combined pollution,the vigor index（VI） ,the shoots length of rape and the novel weight of plant were inhibited obviously as the increase of Pb2 ＋and their combined concentration. Effects of combined pollution were stronger than that of Cd2 ＋ single pollution;meanwhile,effects of Cd2 ＋ single pollution were stronger than that of Pb2 ＋ single pollution.

关 键 词：油菜 镉 铅 种子萌发 生物量 

分 类 号：S-3[农业科学]