重金属元素在玉米植株中分布研究  

Distribution Research of Heavy Metal in the Corn Plants

作　　者：苏春田[1] 唐健生[1] 潘晓东[1] 黄奇波[1] 邹胜章[1] 

机构地区：[1]中国地质科学院岩溶地质研究所,广西桂林541004

出　　处：《中国农学通报》2011年第8期323-327,共5页Chinese Agricultural Science Bulletin

基　　金：广西科学研究与技术开发计划应用基础研究专项(桂科基0991028);中国地质科学院岩溶地质研究所所控项目(2009014)

摘　　要：采用ICP等离子体法对黎塘岩溶区铁锰结核胁迫下的土壤和玉米不同器官进行重金属含量分析,并对玉米不同器官富集系数以及与土壤重金属元素的相关性进行分析。结果表明:(1)重金属元素As、Cd、Cr已对土壤构成了污染;(2)玉米各器官中As、Cd和Cr含量相对较低,Cu、Pb、Zn和Mn含量相对较高;不同器官对重金属的富集总量以叶最高,茎和种子相对较少;玉米根中Cd、Cr含量最高,茎中Pb含量最高,叶中As、Cu、Zn、Mn含量最高,而玉米茎中Zn、Mn含量最低,玉米种子中As、Cd、Cr、Cu、Pb含量最低;玉米植株对重金属元素的平均富集系数普遍较低,其值均低于1.000。(3)玉米根中Mn、Cr与土壤中Mn、Cr达到了显著正相关,茎中Mn与土壤中Mn达到了显著正相关,而玉米茎中Cd、Pb与土壤中Cd、Pb达到了显著负相关,叶中Pb与土壤中Pb达到了显著负相关,玉米种子中重金属元素与土壤中对应的重金属元素均没有达到显著相关,且相关性较低;重金属含量的分析可为当地农业种植提供方向,种植玉米是当地优先选择。By ICP plasma method,heavy metal on soil and different organs of corn plants by Fe-Mn nodules were analyzed in Litang karst area,as well enrichment coefficient and correlation with heavy metal of soil.The study showed that： （1） content of As,Cd,Cr in soil had produced pollution;（2） content of As,Cd,Cr was lower,while content of Cu,Pb,Zn,Mn was higher in different organs of corn;total enrichment of heavy metal was highest in leaf,while that were lower in stem and seed;heavy metal were the highest in different organs of corn plants,Cd,Cr in roots,Pb in stem,As,Cu,Zn,Mn in leaf,while were the lowest as follows,Zn,Mn in stem,As,Cd,Cr,Cu,Pb in seed;average enrichment coefficient of heavy metal was generally low in corn plants,its value was less than 1.000.（3） Mn,Cr of roots were significant positive correlation with the same elements in the soil,as well Mn in stem,while Cd,Pb in stem were significant negative correlation with the same elements in the soil,as well Pb in leaf,heavy metal of corn seeds were no significant positive correlation with the same elements in the soil and correlation were lower.Analysis of heavy metals provided direction to local farming,growing corn was priority choice.

关 键 词：重金属 玉米 分布 相关性 污染 富集系数 

分 类 号：S513[农业科学—作物学]