The effects of biochar aging on rhizosphere microbial communities in cadmium-contaminated acid soil

被引：36

作者：

Bandara, Tharanga ^{[1
]}

Krohn, Christian ^{[1
]}

Jin, Jian ^{[1
]}

Chathurika, J. B. A. J. ^{[1
]}

Franks, Ashley ^{[2
,3
]}

Xu, Jianming ^{[4
,5
]}

Potter, Ian D. ^{[6
]}

Tang, Caixian ^{[1
]}

机构：

[1] La Trobe Univ, Ctr AgriBiosci, Dept Anim Plant & Soil Sci, Melbourne Campus, Bundoora, Vic 3086, Australia

[2] La Trobe Univ, Dept Physiol Anat & Microbiol, Melbourne Campus, Bundoora, Vic 3086, Australia

[3] La Trobe Univ, Ctr Future Landscapes, Melbourne Campus, Bundoora, Vic 3086, Australia

[4] Zhejiang Univ, Coll Environm & Resource Sci, Inst Soil & Water Resources & Environm Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China

[5] Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China

[6] La Trobe Univ, La Trobe Inst Mol Sci, Dept Biochem & Chem, Melbourne Campus, Bundoora, Vic 3086, Australia

来源：

CHEMOSPHERE | 2022年 / 303卷

关键词：

Amendment; Bacterial community; Ca bioavailability; Black carbon; Microbial diversity; Toxicity; BACTERIAL;

D O I：

10.1016/j.chemosphere.2022.135153

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Biochars are widely used in the remediation of Cd-contaminated soils. However, changes in the bacterial communities in the rhizosphere contaminated with Cd in response to biochar aging are poorly studied. Addressing this gap in knowledge is important to improving micro-ecological services on healthy growth of plants with mitigation strategies against Cd contamination. An aging experiment (270 days) was conducted with biochars derived from poultry litter and sugar-gum wood added to a Cd-contaminated acid soil. Bacterial communities in the rhizosphere of Brassica rapa and bulk soils were investigated after 1, 90 and 270 days of biochar aging. There was no significant difference (P > 0.05) in bacterial Shannon and Simpson indices between the control and biochar treatments. However, compared to the no-Cd control, the addition of Cd decreased the relative abundances of Firmicutes, Chloroflexi and Acidobacteriota but increased those of Actinobacteriota and Proteobacteria. Poultry-litter biochar had the largest effect on bacterial community composition, especially in the rhizosphere. Aging of poultry-litter biochar increased the abundance of Armatimonadota over time more than the sugar-gum-wood biochar, which was attributed to a lower pH and higher bioavailability of Cd in the sugar-gum-wood biochar treatment. The addition of poultry-litter biochar to the contaminated soil mitigated the bioaccumulation of Cd by increasing soil pH and restoring soil bacterial ecology in contaminated acid soils over time.

引用

页数：8

共 45 条

[41] Biochar significantly alters rhizobacterial communities and reduces Cd concentration in rice grains grown on Cd-contaminated soils [J].