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首页> 外文期刊>South-East European Forestry >Heavy Metals Content in Foliar Litter and Branches of Quercus petraea (Matt.) Liebl. and Quercus robur L. Observed at Two ICP Forests Monitoring Plots
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Heavy Metals Content in Foliar Litter and Branches of Quercus petraea (Matt.) Liebl. and Quercus robur L. Observed at Two ICP Forests Monitoring Plots

机译：栎属（马特）栎叶的凋落物和分支中的重金属含量。和栎（Quercus robur L）在两个ICP森林监测地块上的观察

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Background and Purpose: Due to the ability to uptake and accumulate heavy metals (HM) in their aboveground tissues, trees may be used for phytoremediation purposes, but also as bioindicators of environmental pollution. The aims of the present study were: a) to investigate the content and temporal variation of the studied HMs in different plant organs during the period of intensive leaf falling (September-October), in two species from genus Quercus; b) to evaluate the observed HMs content relative to plausible ranges of element concentration in foliar litter, as recommended by ICP Forests Foliar Co-ordinating Centre (IFFCC). Material and Methods: The contents of zinc (Zn), manganese (Mn), copper (Cu) and iron (Fe) were assessed in the litterfall (i.e. leaves and branches) of Quercus petraea (Matt.) Liebl. and Quercus robur L. grown at two ICP Forests Level II monitoring plots (Fru?ka Gora and Od?aci, Serbia). Plant material was sampled during September-October 2018 and analyzed by atomic absorption spectrophotometry. Results: Comparing the content of investigated HMs in foliar litter and branches of Q. robur and Q. petraea, notably higher concentrations of Mn and Fe have been observed in the foliage of both species, whereas Zn and Cu concentrations were higher in collected branch material of both of the above-mentioned tree species. The results further showed that, when compared to plausible ranges of element concentrations in foliar litter, given by ICP Forests Foliar Co-ordinating Centre (IFFCC), average concentrations of Fe and Zn in the leaves were within suggested limits, whereas certain concentrations of Mn and Cu exceeded the proposed ranges. Furthermore, the content of the studied HMs in plant material of both Quercus species significantly varied during sampling period. Conclusions: Although it was observed that concentrations of certain HMs were beyond plausible limits recommended by IFFCC, our results were in accordance with the findings of other authors who studied HMs content in Quercus species grown in natural forests. For that reason, these limits should be considered optionally, i.e. in the cases when the results significantly deviate from the suggested values. Moreover, we believe that the observed variation in the HMs content during sampling period is related to the sampling procedure commonly applied at ICP Forests monitoring plots, which is indirectly associated with the capacity of trees to accumulate HMs and their phenological properties.
机译：背景与目的：由于树木能够吸收并在地上组织中积累重金属（HM），因此树木可用于植物修复，也可作为环境污染的生物指示剂。本研究的目的是：a）研究来自栎属的两个物种在密集的落叶期（9月至10月）期间不同植物器官中所研究的HMs的含量和时间变化; b）根据ICP森林叶子协调中心（IFFCC）的建议，评估观察到的相对于叶面垃圾中元素浓度合理范围的HMs含量。材料和方法：在栎栎（Matt。Liebl）的凋落物（即叶子和树枝）中评估锌（Zn），锰（Mn），铜（Cu）和铁（Fe）的含量。和Quercus robur L.生长在两个ICP森林II级监测点（塞尔维亚的Fru？ka Gora和Od？aci）。在2018年9月至10月期间对植物材料进行了采样，并通过原子吸收分光光度法进行了分析。结果：比较Q. robur和Q. petraea的叶片凋落物和分支中被调查的HMs的含量，在两个物种的叶子中均观察到较高的Mn和Fe浓度，而收集的分支材料中的Zn和Cu浓度较高上述两种树种中的一种。结果还表明，与ICP森林叶协调中心（IFFCC）给出的叶凋落物元素浓度的合理范围相比，叶中铁和锌的平均浓度在建议的范围内，而某些浓度的锰铜超过了建议的范围。此外，在采样期间，两种栎属植物材料中所研究的HMs含量均存在显着变化。结论：尽管观察到某些HMs的浓度超出了IFFFC推荐的合理限度，但我们的结果与研究自然森林中栎类物种中HMs含量的其他作者的发现一致。因此，应任选考虑这些限制，即在结果明显偏离建议值的情况下。此外，我们认为，在采样期间观察到的HMs含量变化与ICP森林监测区通常采用的采样程序有关，这与树木积累HMs的能力及其物候特性间接相关。

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