Assessment of Miscanthus x giganteus capacity to restore the functionality of metal-contaminated soils: Ex situ experiment

Souki, Karim Suhail Al; Louvel, Brice; Douay, Francis; Pourrut, Bertrand

doi:10.1016/j.apsoil.2017.03.002

Cited by 34 publications

(30 citation statements)

References 53 publications

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“…Дослідження європейських наукових інститутів (Kayama, 2001;Al Souki et al, 2017;Fernando et al, 2018) свідчать про те, що високі концентрації важких металів пригнічувально впливають на ріст та розвиток деяких видів енергетичних культур через пошкодження коренів та зниження мінерального живлення, особливо азоту і фосфору. На противагу цьому, в польових умовах (протягом двох сезонів) інших досліджень енергетичні культури формували потужну фітомасу та високу врожайність на промислово забруднених землях (Zub & Brancourt-Hulmel, 2009;Evangelou et al, 2015).…”

Section: аналіз останніх досліджень та публікаційunclassified

Phytoremediation aspects of energy crops use in Ukraine

Kulyk¹,

Galytska²,

Samoylik³

et al. 2019

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Today clearing of contaminated soils from heavy metals, pesticide residues is very important problem for Ukraine. Soil pollution is considered to be the result of the functioning of metallurgical and chemical industrial enterprises, as well as the irrational application of chemical plant protection means in the agricultural sector. The range of such preparations as well as the areas of contaminated soils are increasing every year. Phytoremediation with the help of herbaceous plants is one of the most effective methods of decontamination. This list of plants should be supplemented by perennial energy crops, taking into account the absorbing powers of their root system. The basis for preparing the material was the multiple scientific literary sources of domestic and foreign scientists on an investigated theme, the workingout of relevant techniques and scientific and practical recommendations. We applied both general scientific methods (dialectics, analysis and synthesis) and special ones for conducting of analytical review of literature. The largest area of soil in Ukraine is contaminated with cobalt, molybdenum, and copper, whose content exceeds not only the background values but also the maximum permissible concentrations (MPC). It has been defined that the intensity of heavy metals transition in the system "soil-plant" of the energy crops has the following form Cd→Cu→Zn→Pb. Perennial energy crops are capable to create quickly an above ground phytomass and to form an aggressive root system that enables them to accumulate heavy metals from the soil. They can be new and important plants for phytoremediation. At the same time, the energy crops are allocated in accordance with agroclimatic zoning taking into account plant responses to the growing conditions and also applying the scheme of soil remediation from heavy metals. It has been established that energy crops (Switchgrass and Silvergrass) are Hyperaccumulators. They actively absorb heavy metals and partialy accumulate them in their underground and above ground parts. Silvergrass (Miscanthus giganteus) provides higher yield than switchgrass (Panicum virgatum), though switchgrass has less dry matter content, higher accumulation of heavy metals in plant phytomass but the maximum permissible concentration is lower than regulated standards. Silvergrass (Miscanthus giganteus) provides higher yield than switchgrass (Panicum virgatum), though switchgrass has less dry matter content, higher accumulation of heavy metals in plant phytomass and maximum permissible concentration is lower than regulated standards. On termination of the vegetation, the above-ground vegetative mass of these plants can undergo to proper processing that is an additional source of nonferrous metals or biofuel production for energy purposes.

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Section: аналіз останніх досліджень та публікаційunclassified

Phytoremediation aspects of energy crops use in Ukraine

Kulyk¹,

Galytska²,

Samoylik³

et al. 2019

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“…Similar results were also mentioned by Cattaneo et al [21], who stated that the top soil layer (0-15 cm) showed the highest SOC content among the other 15-30 and 30-60 cm layers after 9-year conversion from annual crop system to the perennial miscanthus. In their pot experiment, Al Souki et al [30] also obtained similar results with an increase in the SOC in miscanthus cultivated pots in comparison with the non-cultivated ones. In the present study, the increase of SOC under the miscanthus plot could be related to its perennial nature, in which tillage occurred only in the year of cultivation, and thus the soil erosion was reduced and the carbon content increased due to mineralization reduction [21,40].…”

Section: Impact On Soil Physico-chemical Parametersmentioning

confidence: 54%

“…In the present study, the increase of SOC under the miscanthus plot could be related to its perennial nature, in which tillage occurred only in the year of cultivation, and thus the soil erosion was reduced and the carbon content increased due to mineralization reduction [21,40]. Another reason might be the plant root exudates constituents (carbohydrates, proteins and amino acids) which are regarded as the main source of organic carbon [30,33,41] ( Figure 8, ρ: 0.42, Table S2). Moreover, the return of the leaf residues and their subsequent incorporation into the soil (mainly the 0-10 cm layer) could be also a potential source of the significant SOC augmentation [42].…”

Section: Impact On Soil Physico-chemical Parametersmentioning

confidence: 65%

“…Another factor which might explain the results obtained could be the root exudate composition and the ionic forms, that might lead to the soil acidification [36]. In a low soil quality, the modifications in the exudates and ionic forms in the rhizosphere are considered as one of the mechanisms the miscanthus plants apply to obtain optimal growth conditions and nutrient mobility and thus uptake [30,36]. In spite the fact that the pH values under miscanthus were still within acceptable range for agriculture, nevertheless, these results suggest that miscanthus cultivation holds potentials to cause soil acidification.…”

Section: Impact On Soil Physico-chemical Parametersmentioning

confidence: 99%

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Enhanced Carbon Sequestration in Marginal Land Upon Shift towards Perennial C4Miscanthus × giganteus: A Case Study in North-Western Czechia

et al. 2021

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Bioenergy crops such as Miscanthus x giganteus are foreseeable as an alternative source to replace fossil fuel and reduce greenhouse gas emissions. They are also assessed as an environment-friendly solution for polluted, marginal and low-quality agricultural soils. Several studies had been launched on soil organic carbon sequestration potentials of miscanthus culture along with its impacts on restoring soil functionality, most of which focus on the long-term basis of the plant’s cultivation. Nevertheless, information concerning the short term impacts as well as the situation in Czechia is still scarce. In this context, a field experiment was launched in 2017 in a poor-quality agricultural land in the city of Chomutov (North-Western Czechia) to compare the impacts of the perennial C4 miscanthus with an annual C3 forage crop (wheat) on the soil carbon stocks as well as enhancing its functionality. Results through the 0–30 cm soil profile examination showed that miscanthus plants played a role in improving the studied soil physico-chemical (bulk density and soil organic carbon concentrations) and biological (Phospholipid fatty acids stress indicator, basal respiration and fluorescein diacetate hydrolytic activity) parameters. The naturally occurring δ13C concentrations were used to evaluate the direct plant contribution to the total soil organic carbon (SOC) stocks and revealed considerable miscanthus contribution all over the detected soil layers (1.98 ± 0.21 Mg C. ha−1 yr−1) after only 3 growing seasons. It is thus suggested that the C4 perennial miscanthus possess remarkable prospects for SOC sequestration and restoring degraded lands.

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“…Miscanthus x giganteus was substantiated by its strong ability to grow well in heavy metal polluted districts, which can weaken transferability and enhance accumulation of metals in roots and restrict them to pass on aerial tissues. It has been confirmed that M. x giganteus is an excellent species for phytostabilization because of its ability to decrease transferability and availability of Cd and Zn, as well as its dedication to aggrandize organic carbon amounts of soils (Al Souki et al, 2017). Studies have shown that mangroves growing in coastal rivers, estuaries and gulf intertidal have a strong ability to retain Cr, Pb, Zn, Cu and Ni from tidal waters, freshwater rivers and rainwater runoff while maintaining the stability of the adjacent coastal terrain (Zhou et al, 2010).…”

Section: Bioremediationmentioning

confidence: 94%

Current Status and Development of Remediation for Heavy Metals in China

Xiao

Ding

Khan

et al. 2019

Appl Env Biotechnol

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At present, the problem of heavy metal pollution is a hot topic in the world. There are significant differences in the types and concentrations of metal ions distributed in each contaminated sites. In China, due to the vast territory and diverse ecoenvironments, the pollution situation is complex and variable, and the composite pollution is particularly obvious. Overall, pollution in the southern provinces is relatively higher than in other provinces, and Cd, Hg, Pb, Cr, As and Ni are listed as the priority pollutants for control. The metals have different physical or chemical specificity that allows them to be treated differently. Toxic Cr(VI) needs to be reduced to non-toxic Cr(III) before removal, whereas Cd(II) can form an insoluble Cd compound precipitate under alkaline conditions. Nevertheless, the characteristics of the soil itself such as pH, humidity, mineral composition, etc., are the hurdles in the process of remediation. Therefore, this review systematically summarizes the characteristics of heavy metal contaminated soil in major areas of China. It also proposes appropriate restoration methods and schemes such as phytoremediation and microbial remediation, which provides a theoretical basis for the elimination of heavy metals from a polluted land.

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Assessment of Miscanthus x giganteus capacity to restore the functionality of metal-contaminated soils: Ex situ experiment

Cited by 34 publications

References 53 publications

Phytoremediation aspects of energy crops use in Ukraine

Phytoremediation aspects of energy crops use in Ukraine

Enhanced Carbon Sequestration in Marginal Land Upon Shift towards Perennial C4Miscanthus × giganteus: A Case Study in North-Western Czechia

Current Status and Development of Remediation for Heavy Metals in China

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