Cotton straw biochar and Bacillus compound biofertilizer decreased Cd migration in alkaline soil: Insights from relationship between soil key metabolites and key bacteria

Zhu, Yongqi; Zhong, Mingtao; Li, Weidi; Qiu, Yue; Wang, Haijiang; Lv, Xin

doi:10.1016/j.ecoenv.2022.113293

Cited by 42 publications

(22 citation statements)

References 58 publications

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“…Biofertilizer (J) was purchased from the Lvlong Biotechnology Co., Ltd, Shandong, China. The number of viable bacteria in J was greater than 20 billion·g -1 , the dominant bacterial species was Bacillus , the proportion of miscellaneous bacteria was less than 0.4%, the water content was less than 10%, the pH was 7.8, the total Cd content was 0.0001 mg·L -1 , the total nitrogen content was 900 mg·L -1 , and the organic carbon content was 3791 mg·L -1 ( Zhu et al., 2022 ).…”

Section: Methodsmentioning

confidence: 99%

“…There were twelve treatments totally ( Table 1 ), and each treatment had five replicates. In April 25, 2019, 3% B (360 g/pot, w/w) and 1.5% J (180 g/pot, w/w) were mixed with the prepared Cd-contaminated soils respectively ( Kim et al., 2015 ; Zhu et al., 2022 ). Then, the soils were transferred into pots with a height of 40 cm and a diameter of 25 cm.…”

Section: Methodsmentioning

confidence: 99%

“…Full-scan mode with a range of 50-500 m/z and a rate of 20 spectra·s -1 were used for MS data acquisition. Finally, following the Metabolomics Standards Initiative (MSI) convention, the extraction, alignment, identification, and integration of peaks were implemented on the LECO-Fiehn Rtx5 database ( Zhu et al., 2022 ). The comparative analyses included H3T vs CK, H3J vs H3T, and H3B vs H3T.…”

Section: Methodsmentioning

confidence: 99%

“…(2019) reported that after the application of biofertilizer, the available Cd content in soil decreased by 75.59% compared with that in the control. Zhu et al. (2022) reported that the Cd content in cotton roots and leaves decreased significantly after biofertilizer application.…”

Section: Introductionmentioning

confidence: 99%

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Cotton straw biochar and compound Bacillus biofertilizer reduce Cd stress on cotton root growth by regulating root exudates and antioxidant enzymes system

Zhu

Lv²,

Li³

et al. 2022

Front. Plant Sci.

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IntroductionCotton straw biochar (biochar) and compound Bacillus biofertilizer (biofertilizer) have attracted wide attentions in the remediation of heavy metal-contaminated soils in recent years. However, few studies have explored the metabolomics of lateral roots of Cd-stressed cotton to determine the mechanism of biochar and biofertilizer alleviating Cd stress.MethodsIn this pot experiment, biochar and biofertilizer were applied to the soils with different Cd contamination levels (1, 2, and 4 mg kg-1). Then, the responses of cotton root morphology, vitality, Cd content, and antioxidant enzyme activities were analyzed, and the mechanism of biochar and biofertilizer alleviating Cd stress was determined by metabolomic analysis.ResultsThe results showed that exogenous Cd addition decreased the SOD and POD activities in cotton taproot and lateral root. Besides, with the increase of soil Cd content, the maximum Cd content in taproot (0.0250 mg kg-1) and lateral root (0.0288 mg kg-1) increased by 89.11% and 33.95%, respectively compared with those in the control (p< 0.05). After the application of biochar and biofertilizer, the SOD and POD activities in cotton taproot and lateral root increased. The Cd content of cotton taproot in biochar and biofertilizer treatments decreased by 16.36% and 19.73%, respectively, and that of lateral root decreased by 13.99% and 16.68%, respectively. The metabolomic analysis results showed that the application of biochar and biofertilizer could improve the resistance of cotton root to Cd stress through regulating the pathways of ABC transporters and phenylalanine metabolism.DiscussionTherefore, the application of biochar and biofertilizer could improve cotton resistance to Cd stress by increasing antioxidant enzyme activities, regulating root metabolites (phenols and amino acids), and reducing Cd content, thus promoting cotton root growth.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cotton straw biochar and compound Bacillus biofertilizer reduce Cd stress on cotton root growth by regulating root exudates and antioxidant enzymes system

Zhu

Lv²,

Li³

et al. 2022

Front. Plant Sci.

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“…Along with the efficient stabilization of Cd, extensive studies have focused and highlighted the ecological impact of biochar on the microbial taxa ( Xu et al, 2022 ; Zhu et al, 2022c ). In the natural environment, the abundance and distribution of species in microbial communities are non-uniform, with a few abundant species and a lot of rare species ( Jiao and Lu, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Biochar rebuilds the network complexity of rare and abundant microbial taxa in reclaimed soil of mining areas to cooperatively avert cadmium stress

Zhu

Wang

et al. 2022

Front. Microbiol.

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Understanding the interactions between the soil microbial communities and species is critical in the remediation of heavy metal-contaminated soil. Biochar has been widely applied as a stabilizer in the in situ remediation of cadmium (Cd)-contaminated soils in mining areas. However, the rebuilding of the microbial taxa of rare and abundant species by biochar and their cooperative resistance to Cd stress remains elusive. In this pursuit, the present study envisaged the effects of two types of biochars viz., poplar bark biochar (PB) and thiourea-modified poplar bark biochar (TP) on the rare and abundant bacterial and fungal taxa by using pot experiments. The results demonstrated that the PB and TP treatments significantly reduced the leached Cd content, by 35.13 and 68.05%, respectively, compared with the control group (CK), in the reclaimed soil of the mining area. The application of biochar significantly improved the physicochemical properties like pH and Soil Organic Matter (SOM) of the soil. It was observed that TP treatment was superior to the PB and CK groups in increasing the diversity of the soil abundant and rare species of microbial taxa. Compared with the CK group, the application of PB and TP enhanced and elevated the complexity of the microbial networks of rare and abundant taxa, increased the number and types of network core microorganisms, reshaped the network core microorganisms and hubs, and boosted the microbial resistance to Cd stress. Our results indicate the response of rare and abundant microbial taxa to biochar application and the mechanism of their synergistic remediation of Cd-contaminated soil, thereby providing technical feasibility for in situ remediation of Cd-contaminated soil in mining areas.

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The mechanism of Cd sorption by silkworm excrement organic fertilizer and its effect on Cd accumulation in rice

et al. 2022

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Cotton straw biochar and Bacillus compound biofertilizer decreased Cd migration in alkaline soil: Insights from relationship between soil key metabolites and key bacteria

Cited by 42 publications

References 58 publications

Cotton straw biochar and compound Bacillus biofertilizer reduce Cd stress on cotton root growth by regulating root exudates and antioxidant enzymes system

Cotton straw biochar and compound Bacillus biofertilizer reduce Cd stress on cotton root growth by regulating root exudates and antioxidant enzymes system

Biochar rebuilds the network complexity of rare and abundant microbial taxa in reclaimed soil of mining areas to cooperatively avert cadmium stress

The mechanism of Cd sorption by silkworm excrement organic fertilizer and its effect on Cd accumulation in rice

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