通过对小白河沿岸3个样点5种植物的根部、茎叶进行采样分析,探讨了砷在植物体内富集的特性.结果表明,植物体内砷含量随着土壤砷含量的增加而增加,二者相关性达到显著水平,但植物茎叶受土壤砷的影响较弱.5种植物根部富集系数(EF)与茎叶富集系数(EF)存在极显著的相关关系,即根部砷含量越高,茎叶砷含量也越高.光叶蕨的富集系数(EF)最高,即富集能力最强,野牡丹的富集能力较弱.5种植物的转移系数(TF)大小:光叶蕨＞紫茎泽兰＞青蒿＞三叶鬼针草＞野牡丹.在3个采样点中,转移系数最高的是山上,其次是路边,最后才是河边.%Based on sampling and analyzing the roots & leaves of 5 species plant in 3 sample sites in Xiaobai River riparian, the plant arsenic enrichment characteristics were discussed. The results showed that the plant arsenic content increased with the soil arsenic raising and their correlation was significant, but the soil arsenic influenced less on the plant leaves. There was remarkable correlation at the 0.01 level between the roots enrichment factor (EF) and the leaves enrichment factor (EF), that is, the plant leaves arsenic content was more when the plant root arsenic content increased. The enrichment factor of Knuiwatsukia cuspidate was the highest and its enrichment capacity was the strongest among the 5 plant species, while the Melastoma Affine D.Don enrichment capacity was the weakest. The transfer factor of 5 plant species followed: Knuiwatsukia cuspidate >Eupatorium adenophorum Spreng>Herba Artemisiae Annuae >Bidens pilosa >Melastoma Affine D.Don. The transfer factor of 3 sample sites followed: on the mountain>the road side>the river bank.
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