Tlustoš Pavel, Břendová Kateřina, Száková Jiřina, Najmanová Jana, Koubová Kateřina
a Department of Agro-Environmental Chemistry and Plant Nutrition , Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Science Prague , Prague , Czech Republic.
Int J Phytoremediation. 2016;18(2):110-5. doi: 10.1080/15226514.2014.981243.
Three Cd and Zn hyperaccumulating plant species Noccaea caerulescens Noccaea praecox and Arabidopsis halleri (Brassicacceae) were cultivated in seven subsequent vegetation seasons in both pot and field conditions in soil highly contaminated with Cd, Pb, and Zn. The results confirmed the hyperaccumulation ability of both plant species, although A. halleri showed lower Cd uptake compared to N. caerulescens. Conversely, Pb phytoextraction was negligible for both species in this case. Because of the high variability in plant yield and element contents in the aboveground biomass of plants, great variation in Cd and Zn accumulation was observed during the experiment. The extraction ability in field conditions varied in the case of Cd from 0.2 to 2.9 kg ha(-1) (N. caerulescens) and up to 0.15 kg ha(-1) (A. halleri), and in the case of Zn from 0.2 to 6.4 kg ha(-1) (N. caerulescens) and up to 13.8 kg.ha(-1) (A. halleri). Taking into account the 20 cm root zone of the soil, the plants were able to extract up to 4.1% Cd and 0.2% Zn in one season. However, cropping measures should be optimized to improve and stabilize the long-term phytoextraction potential of these plants.
三种镉和锌超积累植物物种，即天蓝遏蓝菜（Noccaea caerulescens）、早熟遏蓝菜（Noccaea praecox）和南芥（Arabidopsis halleri）（十字花科），在镉、铅和锌高度污染的土壤中，于盆栽和田间条件下连续七个生长季节进行了种植。结果证实了这两种植物物种的超积累能力，尽管与天蓝遏蓝菜相比，南芥的镉吸收量较低。相反，在这种情况下，两种植物对铅的植物提取作用可忽略不计。由于植物产量和地上生物量中元素含量的高度变异性，在实验过程中观察到镉和锌积累存在很大差异。在田间条件下，镉的提取能力变化范围为0.2至2.9千克·公顷⁻¹（天蓝遏蓝菜）以及高达0.15千克·公顷⁻¹（南芥），锌的提取能力变化范围为0.2至6.4千克·公顷⁻¹（天蓝遏蓝菜）以及高达13.8千克·公顷⁻¹（南芥）。考虑到土壤20厘米的根区，这些植物在一个季节内能够提取高达4.1%的镉和0.2%的锌。然而，应优化种植措施，以提高和稳定这些植物的长期植物提取潜力。
