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Biochars regulate bacterial community and their putative functions in the charosphere: a mesh-bag field study

文献类型： 外文期刊

作者： Meng, Jun 1 ; Li, Yan 2 ; Qiu, Yingbo 3 ; Luo, Yu 4 ; Fang, Yunying 5 ; Van Zwieten, Lukas 6 ; Wang, Hailong 7 ; Chen, Huaihai 3 ;

作者机构： 1.Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Inst Ecoenvironm Res, Hangzhou 310023, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Environm Resource & Soil Fertilizer, Hangzhou 310021, Peoples R China

3.Sun Yat Sen Univ, Sch Ecol, State Key Lab Biocontrol, Shenzhen 518107, Peoples R China

4.Elizabeth Macarthur Agr Inst, NSW Dept Primary Ind, Menangle, NSW 2568, Australia

5.Zhejiang Univ, Coll Environm & Nat Resource Sci, Zhejiang Prov Key Lab Agr Resources & Environm, Hangzhou 310058, Peoples R China

6.Dept Primary Ind, Soil & Water Res & Dev, Wollongbar, NSW 2477, Australia

7.Foshan Univ, Biochar Engn Technol Res Ctr Guangdong Prov, Sch Environm & Chem Engn, Phys Sci Publ Platform, Foshan 528000, Guangdong, Peoples R China

关键词： Biochar; Microbial community; Soil; Heavy metal; High-throughput sequencing

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.536； 五年影响因子：3.821 ）

ISSN： 1439-0108

年卷期：

页码：

收录情况： SCI

摘要： Purpose The term "charosphere" refers to the biochar-contiguous soil that is directly influenced by the physicochemical properties of the biochar, yet the dynamics of microbial composition in the charosphere in heavy metal-polluted soil remains largely unknown. Methods Swine manure-derived biochars prepared at 300 and 700 degrees C were packed in a double-layer mesh bag and then buried in a Cd-contaminated paddy soil for 15 days (T1) and 95 days (T2). Bacterial community composition in the charosphere and the linked properties such as soil pH, dissolved organic carbon (DOC) contents, and total Cd and Zn concentrations were analyzed. Results The results showed that biochar significantly shifted the beta diversity of the bacterial community in the charosphere, mainly due to increase in pH and total Zn concentrations. Further, 300 degrees C-prepared biochars stimulated Bacteroidetes and inhibited Acidobacteria by increasing soil pH. In the charosphere of biochars prepared at 700 degrees C, associated with the release of Zn and the adsorption of Cd, Chloroflexi became favorable over other microbial groups. Both biochar additions gave an increase in the putative function of energy metabolism and lipid metabolism, which might help bacteria dominant in charosphere resist stress of heavy metals. Conclusion Taken together, these pieces of evidence suggest that bacterial community and potential functions in the charosphere differ remarkably from the control soil without biochar, which was mainly due to biochar reduced environmental stresses such as soil acidity and heavy metals.

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