Institute for Ecology of Industrial Areas, 6 Kossutha Street, 40-844, Katowice, Poland.
Environ Sci Pollut Res Int. 2018 Apr;25(12):12096-12106. doi: 10.1007/s11356-018-1490-8. Epub 2018 Feb 16.
Heavy metals (HMs) contamination of soils is a major problem occurring worldwide. Utility of energy crops for biofuel feedstock production systems offers a feasible solution for a commercial exploitation of an arable land contaminated with HMs. Experiments involved field testing of Miscanthus x giganteus and Spartina pectinata cultivated on HMs-contaminated soil with standard NPK fertilizers and commercially available microbial inoculum. Biomass yield, water content, macronutrients (N, P, K, Mg, Ca), and heavy metal (Cd, Pb, Zn) concentrations in plant shoots were assessed at the end of the first and the second growing season. Independently of the applied fertilizers, Miscanthus x giganteus produced higher biomass yield while contrary results were obtained for S. pectinata. Higher HMs content in plants influenced the status of the mineral macronutrients in particular N and K. Occurrence of hasted senescence induced by drought in the second growing season caused reduction in the concentrations of all elements (except Pb), due to earlier rhizomes relocation.
土壤重金属污染是一个全球性的主要问题。能源作物作为生物燃料原料生产系统的应用为利用受重金属污染的耕地提供了一种可行的解决方案。实验涉及在受重金属污染的土壤上用标准 NPK 肥料和市售微生物接种剂种植芒草和大米草的田间试验。在第一个和第二个生长季节结束时,评估了植物地上部分的生物量产量、含水量、大量营养素(N、P、K、Mg、Ca)和重金属(Cd、Pb、Zn)浓度。独立于施用的肥料,芒草产生了更高的生物量产量,而大米草则得到了相反的结果。植物中较高的重金属含量影响了特别是 N 和 K 的矿物质大量营养素的状况。由于根茎更早地重新定位,第二个生长季节干旱引起的快速衰老导致所有元素(除 Pb 外)浓度降低。