Soil bacterial community responses to cadmium and lead stabilization during ecological restoration of an abandoned mine

Zhao, S. P.; Qin, Luyao; Wang, Lifu; Sun, Xiaoyi; Yu, Lei; Wang, Meng; Chen, Shibao

doi:10.1111/sum.12797

Cited by 3 publications

(3 citation statements)

References 57 publications

(54 reference statements)

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“…Rhizosphere soil pH was measured by a pH meter (Denver Instrument UB‐7, ultra BASIC, Denver Instrument, USA) after mixing samples with deionized water (soil: water = 1:2.5 w/w) and shaking for 1 h. Soil organic carbon (OC) was measured using the potassium bichromate titrimetric method. An unbuffered silver–thiourea method was used to measure cation exchange capacity (CEC) (Zhao et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

“…Except that the intercropping system to the field can change the bioavailability of heavy metals, Wang (Wang et al, 2020) studied that intercropping alligator flag with rice would therefore make it possible to effectively remediate moderate Cd‐contamination farmland with a huge potential of more than 10 million hectares in China, and also to safely produce rice at the same time. Moreover, soil physical and chemical properties, for example, pH, dissolved organic carbon (DOC) were also affected, which significantly caused the change of Cd bioavailability in the soil (Xu et al, 2021; Zhao et al, 2022). Kang (Kang et al, 2021) studied that in the intercropping system of rice with Sesbania cannabina L., the concentration of Cd in grains of rice were significantly lower than that of monocropped rice, decreasing by 40%, which further demonstrated that intercropping can reduce the effectiveness of Cd.…”

Section: Introductionmentioning

confidence: 99%

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Intercropping with herbs minimizes cadmium availability through altering physicochemical dynamics and metabolite profiles in wheat rhizosphere

Qin

Sun

et al. 2022

Soil Use and Management

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For the past few years, the production of safe crops in Cd‐contaminated soil has attracted more and more attention, and the intercropping of wheat and herbaceous plants has gradually become an effective way. However, how the physicochemical and metabolic processes because of the intercropping change Cd availability are still unclear. In this study, we studied the influence of changes in soil physicochemical properties induced by intercropping of wheat with different herbs on soil Cd availability of Cd. Meanwhile, we innovatively studied the effect of intercropping on rhizosphere metabolites and evaluated the impact on Cd transfer. Results showed that the highest wheat biomass was presented in the intercropping system with the Cichorium intybus L. (W4) and Aus hypochondriacus L. (W5) increasing by 57.66% and 54.05% individually, compared with monocropping, while W1, W2, and W3 increasing slightly. Further, the Cd accumulation in wheat grains under W4 and W5 treatment decreased by 44.95% and 43.12%, respectively. Structural equation model confirmed that the increased pH, CEC contributed to the decreased Cd availability in soil, as well the changed metabolic profiles in wheat rhizosphere after intercropping. Specially, up‐regulation of fatty acid metabolism allowed wheat plants to maintain a normal intracellular environment under stress conditions. Similarly, up‐regulation of saccharide and amino acid metabolism induced the accumulation of sugars and proteins, which positively increased wheat biomass and Cd‐binding proteins, thus inhibiting the migration of soil Cd into wheat tissue. Collectively, this study provided reasonable insights towards understanding the metabolic mechanisms how intercropping altered Cd availability.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Intercropping with herbs minimizes cadmium availability through altering physicochemical dynamics and metabolite profiles in wheat rhizosphere

Qin

Sun

et al. 2022

Soil Use and Management

Self Cite

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“…Recent attempts have been made to reduce organic carbon loss from soils for climate change mitigation, whose measures include crop residue incorporation (Lupwayi et al 2022;Zhu et al 2022a), organic matter stabilization with clay and metal oxides (Baumann et al 2022;Di et al 2022), fertilizer application (da Silva et al 2022;Gasser et al 2022;Qiu et al 2022;Thakur et al 2022;Zhang et al 2022b), reduced or conservational tillage (Ferrara et al 2022;He et al 2022a;Islam et al 2022), rotational grazing (Abdalla et al 2022;Dong et al 2021), silvopastoral system (Aryal et al 2019;Valenzuela Que et al 2022), and ecological restoration (Howson et al 2022;Wang et al 2020b;Zhao et al 2022). Among them, application of biochar is a promising one due to simultaneous achievement of waste management, nutrient delivery, contaminant immobilization, and climate change mitigation.…”

Section: Co 2 Emissionsmentioning

confidence: 99%

Role of biochar toward carbon neutrality

Wang

Deng²,

Yang³

et al. 2023

Carbon Res.

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Carbon neutrality by the mid-twenty-first century is a grand challenge requiring technological innovations. Biochar, a traditional soil amendment which has been used for fertility improvement and contaminant remediation, has revealed new vitality in this context. In this review we highlight the huge potential of biochar application in different fields to mitigate as high as 2.56 × 109 t CO2e total greenhouse gas (GHG) emissions per year, accounting for 5.0% of the global GHG emissions. Soil applications of biochar as either a controlled-release fertilizer or an immobilization agent offer improved soil health while simultaneously suppressing the emissions of CH4 and N2O. Non-soil applications of biochar also contribute to carbon neutrality in unique ways. Firstly, biochar application as a ruminant feed decreases CH4 emissions via physical sorption and enhanced activities of methanotrophs. Secondly, biochar can be used as a green catalyst for biorefinery. Besides, biochar as an additive to Portland cement and low impact development (LID) infrastructure lowers the carbon footprint and builds resilience to climate change. Furthermore, biochar can be used as novel batteries and supercapacitors for energy storage purposes. Finally, the high CO2 adsorption capacity makes it possible for biochar being used as a sorbent for carbon capture, utilization, and storage (CCUS). We advocate that future research should further explore the effectiveness of biochar systems for climate change mitigation in large scale applications, and assess the economic and social viability of local biochar systems to combat climate change. Graphical Abstract

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Soil bacterial community responses to cadmium and lead stabilization during ecological restoration of an abandoned mine

Cited by 3 publications

References 57 publications

Intercropping with herbs minimizes cadmium availability through altering physicochemical dynamics and metabolite profiles in wheat rhizosphere

Intercropping with herbs minimizes cadmium availability through altering physicochemical dynamics and metabolite profiles in wheat rhizosphere

Role of biochar toward carbon neutrality

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