نبذة مختصرة : In this study, the environmental monitoring of the long-term technogenic pollution zone of Novocherkassk, a region containing numerous heavy metal contaminations, was carried out. In the plants growing in the 5 km zone around Novocherkasskaya power station, contamination with the studied elements was revealed. The dependence of the content of Zn and Cd in herbaceous plants of the families Asteraceae and Poaceae on the distance to the source of the anthropogenic load was established. The selectivity of accumulation of metals by studied species of herbaceous plants at different levels of technogenic pollution is revealed. Achillea nobilis has the least pollutants resistant from the soil. Poa pratensis has the highest resistance to Zn and Cd pollution in terms of the set of assessment indicators. The granulometric composition of the soil has a significant impact on the availability of metals to plants. © 2020 Federation of Eurasian Soil Science Societies. All rights reserved. Ministry of Science and Higher Education of the Russian Federation Under technogenic pollution, the highest Cd translocation was observed in ragweed, yarrow, and tansy, and the lowest level was established for bluegrass (Table 1). At plot No. 9, ragweed, tansy, and wormwood had the maximum DC values while bluegrass was characterized by the least intense Cd translocation from the roots to the aerial part as in case of the increased anthropogenic load. In general, the highest and lowest Cd translocation among the studied species was established for ragweed and bluegrass, respectively. Thus, for the plants of the Asteraceae family, there was a significantly higher accumulation of Zn and Cd, as well as translocation of these HM from roots to aboveground organs, compared to the Poaceae family. Bluegrass (Poa pratensis L.) according to this indicator was the most resistant plant to HM pollution. Conclusion High levels of soil pollution lead to excessive accumulation of heavy metals in the plants. Long-term technogenic pollution is established at NPS. The negative effects of emissions from NPS affect wild herbaceous plants growing within a 5 km zone, primarily in the north-west direction. The Zn and Cd were found to be the priority soil contaminants of the territories under study. Plant species specificity with respect to the studied pollutants was revealed. Plants of the Asteraceae family were found to accumulate larger amounts of HM than that of the Poaceae family. The Asteraceae family demonstrated the predominant accumulation of Zn and Cd in the aerial part, while the Poaceae family accumulates them in the root system. Ragweed, wormwood, and tansy were found to be characterized by the greatest translocation of elements from the roots to the aboveground parts, as a consequence, demonstrating low resistance to HM pollution. The least resistance to HM entry from the soil is established for yarrow noble. Bluegrass demonstrates the 171 highest resistance to Zn and Cd pollution in terms of the aggregate DC and AC indicators. The light granulometric composition of soil contributed to greater HM availability to plants. Along with general patterns, specific features of Zn and Cd accumulation by plants were revealed. The Cd exhibited a noticeably greater mobility in soils than Zn, which led to a higher level of plant contamination and higher AC values. A successful integrated approach suggested in for studying Zn and Cd accumulation along with consideration of plant barrier functions pave the way to successfully predict the negative effects of technogenic environmental pollution in the future. Acknowledgments The research was supported by the project of the Ministry of Science and Higher Education of the Russian Federation within the framework of the state task of the Southern Federal University for 2020-???? ( ? FENW-2020-0028). References
Processing Request
No Comments.