Abstract: The variation of cadmium (Cd) and lead (Pb) contents on the basis of Cd and Pb applied to soil was investigated in pot-cultured passionfruit (P. edulis Sims and P. edulis Sims f. flavicarpa Degener).The results showed that the distribution of Cd and Pb in passionfruit ranked as:branches >leaves >fruits.The Cd contents had no significant difference in different varieties of passionfruit, while the Pb contents had.The contents of Cd and Pb in the branches and leaves of passionfruit increased with the increasing of their treatment concentration.The contents of Cd and Pb in the branches and leaves of passionfruit had great significant positive correlation with their concentration applied to soil.The passionfruit plant had stronger ability to uptake Cd than Pb with the bio-enrichment coefficients of Cd were all more than 1.When Pb added to soil was 1000 mg/kg, the content of Pb in fruit was less than the maximum limit in contamination-free fruits.In planting practice, even in the higher levels of Pb polluted soil, passionfruit fruit could be free of Pb pollution, but more special attention should be paid to Cd pollution risks.

Key words: passionfruit, cadmium, lead, pollution, accumulation

摘要： 以紫果西番莲和黄果西番莲为试材进行盆栽试验,研究镉、铅处理后西番莲体内镉、铅含量变化。结果表明,镉、铅在西番莲体内分布的一般规律是枝蔓> 叶> 果。不同品种西番莲的镉含量未见显著差异,而铅含量则呈显著差异。西番莲枝蔓和叶对镉、铅的吸收量分别随着各自处理浓度的增加而增加;统计显示,西番莲枝蔓和叶的镉、铅含量与各自土壤的添加量呈极显著正相关。值得注意的是,西番莲对镉有较强的吸收能力(枝蔓和叶对土壤镉的富集系数均大于1),而对铅的吸收能力较差。在本试验中,铅处理浓度为1 000 mg/kg时,西番莲果实可食部分铅的含量也低于无公害果品标准,说明西番莲作为果树生产时,即使在铅含量较高的污染土上种植,也是安全的;但要特别注意镉的污染风险。

关键词: 西番莲, 镉, 铅, 污染, 累积