DGT methodology is more sensitive than conventional extraction strategies in assessing amendment-induced soil cadmium availability to rice

Luo, Huilong; Du, Ping; Shi, Jianghong; Yang, Bin; Liang, Ting; Wang, Panpan; Chen, Juan; Zhang, Yunhui; He, Ying; Jia, Xiuwen; Duan, Guilan; Li, Fasheng

doi:10.1016/j.scitotenv.2020.143949

Cited by 24 publications

(19 citation statements)

References 64 publications

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“…Cadmium, a common metal found in the soil, interrupts soil microorganisms' enzyme activities such as denaturing enzymes, deteriorates membrane structure, followed by interruption of function and interference with enzyme synthesis in cells [135,136]. Apart from that, pH has a key influence in cadmium availability in soil, where higher pH, clay and organic matter content in the soil lowers Cd availability through reducing metal mobility in the soil [137,138]. Due to its poor mobility and weaker affinity for soil colloids, Cd has been demonstrated to be more lethal on enzymes compared to Pb [128].…”

Section: Metal Toxicitymentioning

confidence: 99%

Effects of Abiotic Stress on Soil Microbiome

Rahman

Hamid

Nadarajah

2021

IJMS

117

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Rhizospheric organisms have a unique manner of existence since many factors can influence the shape of the microbiome. As we all know, harnessing the interaction between soil microbes and plants is critical for sustainable agriculture and ecosystems. We can achieve sustainable agricultural practice by incorporating plant-microbiome interaction as a positive technology. The contribution of this interaction has piqued the interest of experts, who plan to do more research using beneficial microorganism in order to accomplish this vision. Plants engage in a wide range of interrelationship with soil microorganism, spanning the entire spectrum of ecological potential which can be mutualistic, commensal, neutral, exploitative, or competitive. Mutualistic microorganism found in plant-associated microbial communities assist their host in a number of ways. Many studies have demonstrated that the soil microbiome may provide significant advantages to the host plant. However, various soil conditions (pH, temperature, oxygen, physics-chemistry and moisture), soil environments (drought, submergence, metal toxicity and salinity), plant types/genotype, and agricultural practices may result in distinct microbial composition and characteristics, as well as its mechanism to promote plant development and defence against all these stressors. In this paper, we provide an in-depth overview of how the above factors are able to affect the soil microbial structure and communities and change above and below ground interactions. Future prospects will also be discussed.

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Section: Metal Toxicitymentioning

confidence: 99%

Effects of Abiotic Stress on Soil Microbiome

Rahman

Hamid

Nadarajah

2021

IJMS

117

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“…This may be because the available Cd was significantly negatively related to soil pH. Luo et al (2021) reported that DGT-Cd was mainly negatively correlated to soil pH. Furthermore, the sensitivity of the detection method influenced the change of soil environment induced the application of soil amendments.…”

Section: Treatmentsmentioning

confidence: 99%

“…Cd accumulation, Cd bioavailability, diffusive gradients in thin films (DGT), soil amendments, spinach biomass (Luo et al, 2021). In recent years, people have used diffusive gradients in thin films (DGT) to assess the toxicity of soil toxic metals (Ma et al, 2020;Tian et al, 2018;Xu et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have carried out various practices to remediate Cd‐polluted farmlands (NaziaTahir et al., 2021; Xie et al., 2021), and found that supplying soil amendments is an inexpensive and eco‐friendly practice (Luo et al., 2021; Wang, Shen, et al., 2022a). Numerous organic and inorganic amendments including biochar, phosphate compounds, industrial by‐products, layered double hydroxides, clay mineral and calcium‐based material have been applied for the immobilization of toxic metals (Shao et al., 2021; Tan et al., 2022; Xiang et al., 2021; Zhang et al., 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the above equilibrium‐based methods have limitations in hindering the re‐adsorption of metals on soil particles in chemical extractions, which ignores the contribution of the root‐soil interface to Cd accumulation in plants (Dai, Nasir, et al., 2017a; Ma et al., 2022). For example, CaCl 2 only can extract metal components on mineral surfaces and most extracted fractions are water‐soluble (Luo et al., 2021). In recent years, people have used diffusive gradients in thin films (DGT) to assess the toxicity of soil toxic metals (Ma et al., 2020; Tian et al., 2018; Xu et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

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Assessment of thin film gradient diffusion technique for precise analysis of soil cadmium passivation and uptake inhibition by different amendments

Fan,

Ding,

Wang

et al. 2023

Soil Use and Management

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The utilization of the thin film gradient diffusion technique has been on the rise for appraising the efficacy of soil cadmium (Cd). Nonetheless, in contrast to conventional methodologies employed to gauge the efficacy of soil Cd, there exists a dearth of adequate research concerning whether the technique of diffusive gradients in thin films (DGT) can furnish a more precise and all‐encompassing evaluation of soil Cd effectiveness in soil passivation and remediation procedures. Herein, this study selects four popular amendments (i.e., oyster shells, red mud, hydroxyapatite, and biochar) and analyzes the correlations among soil Cd availability, Cd uptake amount, and spinach biomass. Results showed that the following concentration ranges: DGT‐Cd (1.78 ‐ 21.1 μg L‐1), HAc‐Cd (1.84 ‐ 2.22 mg kg‐1), DTPA‐Cd (0.62 ‐ 1.22 mg kg‐1), and CaCl2‐Cd (0.0489 ‐ 0.103 mg kg‐1). Among the methods, CaCl2 extraction had a lower capacity to extract soil Cd compared to the other methods. These amendments improved soil environment, promoted spinach growth, and decreased plant Cd concentrations. Oyster shells and red mud treatments significantly reduced DGT‐Cd levels (by 90.4% and 82.2%, respectively), which led to a reduction in plant Cd concentrations (by 77.1% and 72.4%) and bioconcentration factor (by 75.8% and 68.8%). Furthermore, oyster shells were found to be most effective in reducing soil‐available Cd and inhibiting Cd uptake by spinach. Based on correlation analysis, the DGT method showed the largest measurement range and provided the best prediction of Cd accumulation in spinach compared to chemical extraction methods (R2=0.88, p<0.001). Overall, the use of DGT in combination with plant uptake and chemical extraction data can provide a comprehensive assessment of soil Cd bioavailability. These findings facilitate an accurate and comprehensive evaluation of the bioavailability of Cd after applying amendments. These results also showed that oyster shells can be regarded as a promising eco‐friendly and low‐cost amendment for large‐scale immobilizing Cd and producing plants with lesser Cd concentrations.

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