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The succession of microbial communities after residue returning in a Solonchak

文献类型： 外文期刊

作者： Huang, Fan 1 ; Li, Qinjin 2 ; Xue, Lihua 3 ; Han, Jiangang 4 ; Zamanian, Kazem 1 ; Zhao, Xiaoning 1 ;

作者机构： 1.Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Peoples R China

2.Hunan Womens Univ, Sch Social Dev & Management, Changsha 410004, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Grain Crops, Urumqi 830091, Peoples R China

4.Nanjing Forestry Univ, Coll Biol & Environm, Nanjing 210037, Jiangsu, Peoples R China

5.Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Jiangsu, Peoples R China

6.Natl Positioning Observat Stn Hung tse Lake Wetlan, Hongze 223100, Jiangsu, Peoples R China

7.Leibniz Univ Hannover, Inst Soil Sci, Herrenhauser Str, D-230419 Hannover, Germany

关键词： Maize residues decomposition; Microbial community; Metabolic function; Residue management; Global warming

期刊名称：PLANT AND SOIL （ 影响因子：4.9； 五年影响因子：5.2 ）

ISSN： 0032-079X

年卷期： 2023 年

页码：

收录情况： SCI

摘要： 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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