重金属Pb、Cd在叶菜中的富集状况及对其生长的影响

Enrichment of heavy metals Pb and Cd in leafy vegetables and the effects on their growth

为研究不同浓度的重金属Pb、Cd在叶菜不同部位(根、茎、叶)中的富集状况,以及对叶菜生长状况的影响,进行土培盆栽试验。结果表明,当在土壤中添加不同浓度重金属时,3种叶菜不同部位Pb、Cd的富集量均表现为随着土壤中添加浓度的增加而增大;当在土壤中添加同一浓度重金属时,Pb在3种叶菜的富集量表现为菠菜>苔菜>油菜,叶>根>茎;Cd在3种叶菜的富集量表现为菠菜>油菜>苔菜,根>茎>叶;当土壤中重金属Pb和Cd超出一定浓度时会影响叶菜的出芽率和出芽时间,并使之出现萎蔫、发黄、等现象,而高浓度的Cd还会使3种叶菜出现斑点。

For the study of different concentrations of heavy metals Pb, Cd in different parts of leaf vegetables(root, stem and leaf) of enrichment, and the influence on the growth condition of leafy vegetables, the soil culture pot experiment was conducted. The results showed that when adding different concentrations of heavy metals in soil, the three kinds of enrichment of Pb, Cd in the different parts of leafy vegetables were characterized by increased with the increase of concentration added in soil increased. When heavy metals of the same concentration were added to the soil, the enrichment of Pb in the three leafy vegetables was as follows: Spinach >moss vegetables >rape, leaf>root>stem;The enrichment of Cd in three leafy vegetables was as follows: Spinach>rape>moss vegetables, root>stem>leaves. When the heavy metals Pb and Cd in the soil exceeds a certain concentration, the germination rate and germination time of leafy vegetables will be affected, and the leaf vegetables will wilt, turn yellow, etc., make them wilt, while the high concentration of Cd will also cause spots in the three leaf vegetables.