Liu Junli, Qiu Gaoyang, Liu Chen, Lin Yicheng, Chen Xiaodong, Li Hua, Fu Qinglin, Guo Bin
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
Biology (Basel). 2022 Jul 28;11(8):1133. doi: 10.3390/biology11081133.
Intercropping plants for phytoremediation is a promising strategy in heavy metal-polluted soils. In this study, two typical greening plant species, () and (), were intercropped in a Cd/Cu/Zn-contaminated field. The phytoremediation efficiency was investigated by measuring the plant biomass, metal concentration, and mycorrhizal colonisation, as well as the effects on soil properties, including soil pH; soil total N; and available N, P, K, Cd, Cu, and Zn. The results showed that, compared with the monoculture system, intercropping significantly lowered the available Cd, Cu, and Zn contents, significantly improved the total and available N contents in rhizosphere soils of both plant species, and increased the hyphae colonisation rate of . In both plants, intercropping significantly improved the total plant biomass. Furthermore, the concentrations Zn and Cd in the root of and Cu concentration in the root of were enhanced by 58.16%, 107.74%, and 20.57%, respectively. Intercropping resulted in plants accumulating higher amounts of Cd, Cu, and Zn. This was particularly evident in the total amount of Cd in , which was 2.2 times greater than that in the monoculture system. Therefore, this study provides a feasible technique for improving phytoremediation efficiency using greening plants.
间作植物用于植物修复是重金属污染土壤治理中一种很有前景的策略。在本研究中，将两种典型的绿化植物物种（）和（）间作于镉/铜/锌污染农田中。通过测量植物生物量、金属浓度、菌根定殖情况以及对土壤性质的影响（包括土壤pH值、土壤全氮以及有效氮、磷、钾、镉、铜和锌）来研究植物修复效率。结果表明，与单作系统相比，间作显著降低了有效镉、铜和锌的含量，显著提高了两种植物根际土壤中的全氮和有效氮含量，并提高了（）的菌丝定殖率。在两种植物中，间作显著提高了植物总生物量。此外，（）根部的锌和镉浓度以及（）根部的铜浓度分别提高了58.16%、107.74%和20.57%。间作使植物积累了更多的镉、铜和锌。这在（）中的镉总量上尤为明显，比单作系统中的镉总量高出2.2倍。因此，本研究为利用绿化植物提高植物修复效率提供了一种可行的技术。
