不同工业大麻品种对田间5种重金属吸收积累特性的比较

为了分析不同工业大麻品种对不同重金属富集与转移的差异，以云南5个工业大麻主栽品种（ym1~ym5）为试验材料，修复云南矿区重金属污染严重的农田。结果表明： 5个工业大麻品种中，成熟期的根系对Pb和Cd吸收量最大的为ym1，对As、Cu和Zn吸收量最大的为ym3，而ym5对Pb、Cu、Cd和Zn吸收量皆最小；茎叶对As、Cu和Cd吸收量最大的为ym3，对Pb和Zn吸收量最大的分别为ym1和ym2；种子对Pb和Cd吸收量最大的为ym2，对As和Cu吸收量最大的为ym5，对Zn吸收量最大则为ym3，ym1种子对Pb、As和Cu吸收量皆最小，对Cd、Zn吸收最小的品种分别为ym4和ym2；5个品种表现为除Cu外，茎叶富集系数皆大于根，根系向茎叶的转运系数均大于1。研究表明，ym1可作为Pb污染修复植物，ym3可作为As、Zn、Cu和Cd污染修复的适推品种。

Comparison of the absorption and accumulation characteristics of five heavy metals among different industrial hemp varieties

This study examined variations in the enrichment and transfer of heavy metals by different industrial hemp varieties. Five main varieties(ym1~ym5) of industrial hemp were used as experimental materials to repair farmland seriously polluted by heavy metals in mining areas of Yunnan Province. Among the five industrial hemp varieties, ym1 absorbed the most Pb and Cd, ym3 absorbed the most As, Cu, and Zn, while ym5 had the lowest absorption of Pb, Cu, Cd, and Zn in mature roots. The maximum absorption of As, Cu, and Cd by stems and leaves was observed in ym3, and the maximum absorption of Pb and Zn occurred in ym1 and ym2, respectively. The maximum absorption of Pb and Cd by seeds was seen in ym2, of As and Cu was seen in ym5, and of Zn was seen in ym3. Seeds of ym1 showed the least absorption of Pb, As, and Cu, and the least absorption of Cd and Zn were seen in the seeds of ym4 and ym2, respectively. The enrichment coefficients of stems and leaves in the five varieties were greater than that of roots, except Cu. The transport coefficients of roots to stems and leaves were all greater than 1. In summary, ym1 can be used for Pb repair, and ym3 is suitable for As, Zn, Cu, and Cd repair.