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The succession of microbial communities after residue returning in a Solonchak

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Abstract

Aims

Residue returning is a practical agricultural management to combat global warming. However, the role of the microbial community and the metabolic functions during residue decomposition is vague, especially in saline soils. We aimed to clarify these roles during residue decomposition in saline soils.

Methods

Gas chromatography and high-throughput sequencing techniques were used to measure soil CO2 efflux and microbial community composition on soil and residue surfaces, respectively.

Results

The CO2 release rate (mg C kg−1 dry soil per day) decreased from 188.5 to 28.4 from 1 to 15 days, and to 2.6 on the 90th day. The model showed that it took 15 days for the decomposition of the residue labile component and 462 days for a recalcitrant component. The changed dominant leaf surface bacteria class were the Bacilli 39–51% (0–4 days), then Alphaproteobacteria 5–40% (4–15 days), afterward Bacteroidia 20–19% (15–90 days). The changed dominant leaf surface fungal class was Mucoromycetes 24–40% (0–4 days), Eurotiomycetes 28–48% and 22–44% (0–90 days). The major bacterial (>60%) and fungal (>50%) groups that decompose maize residue were present before the residue enter into soil. Compared with soil bacterial community, soil fungi community showed more differences after adding residue. The bacterial genes of Membrane transport and Carbohydrate metabolism on the maize residue surface were stronger than soil with residues during 90 days by function prediction analysis.

Conclusions

Bacilli, Alphaproteobacteria and Mucoromycota were the most important microorganisms for maize leaf decomposition. The residues are mainly decomposed by the microorganisms derived from the residue surface after entering soils.

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Acknowledgments

This work was supported by the Jiangsu Specially-Appointed Professor Project, China (Grant number R2020T29) and the Xinjiang Tianchi Specially-Appointed Professor Project, China; Jiangsu Provincial Science and Technology Innovation Special Fund Project of Carbon Emission Peak and Carbon Neutralization (frontier and basis) (Grant Number BK20220016); the National Natural Science Foundation of China (Grant numbers 41877109; 42050410320); Jiangsu Provincial Agricultural Science and Technology Innovation project (Grant Number CX(22)3133); a project Supported by Scientific Research Fund of Hunan Provincial Education Department (22B0920).

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Authors

Contributions

Material preparation and analysis were performed by Fan Huang and Xiaoning Zhao. The first draft of the manuscript was written by Fan Huang. Review, editing, and revision were conducted by Xiaoning Zhao. Jiangang Han, Kazem Zamanian, Lihua Xue and Qinjin Li commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Kazem Zamanian or Xiaoning Zhao.

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Competing interests

The authors have no relevant financial or non-financial interests to disclose. All authors contributed to the study’s conception and design.

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Responsible Editor: Elizabeth M Baggs.

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Huang, F., Li, Q., Xue, L. et al. The succession of microbial communities after residue returning in a Solonchak. Plant Soil 492, 191–208 (2023). https://doi.org/10.1007/s11104-023-06172-7

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  • DOI: https://doi.org/10.1007/s11104-023-06172-7

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