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- Title
豆瓣菜在镉铅复合污染条件下的镉铅积累特性.
- Authors
王建兵; 王金涛; 颜可昕; 郭小兰; 王盾; 戴洪文
- Abstract
In order to find out the cadmium (Cd) and lead (Pb) accumulation characteristics of watercress (Nasturtium officinale R. Br.) under Cd-Pb combined pollution, the high and low cadmium accumulation genotypes of watercress screened in prior tests were utilized in the present study, and the changes of aboveground biomass, Cd, Pb content and accumulation factor of watercress were examined via pot experiments. It was shown that the average aboveground biomass (fresh weight) of watercress under medium and high dose Pb treatment was significantly (P<0.05) increased both by 10.2% than that under low Pb treatment with medium Cd contamination (total Cd content in soil was 0.56-0.58 mg·kg-1), which indicated that a certain concentration of Pb in the soil promoted the growth of watercress. The Cd content and accumulation factor in the aboveground part of low cadmium accumulation genotypes of watercress were significantly lower than those of high cadmium accumulation genotypes. With the increase of Pb concentration in soil, Cd content in the aboveground part of watercress was significantly enhanced, which indicated that Pb promoted the absorption and accumulation of Cd in watercress. However, the Pb uptake and accumulation of watercress were relatively low. The Pb accumulation factor of all the tested genotypes was small, as the maximum value was 0.075. Under the experiment conditions, the Pb content in the aboveground part of watercress was below the limit of the Codex Alimentarius Commission (CAC) standard. So, the risk of Pb contamination of watercress was generally low.
- Publication
Acta Agriculturae Zhejiangensis, 2023, Vol 35, Issue 11, p2664
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.20221812