生物炭
芽单胞菌门
酸杆菌
物种丰富度
环境科学
土壤质量
土壤水分
农学
生态学
化学
土壤科学
生物
放线菌门
热解
细菌
有机化学
遗传学
16S核糖体RNA
作者
Wenhuan Xu,Hanmei Xu,Manuel Delgado‐Baquerizo,Michael J. Gundale,Xiaoming Zou,Honghua Ruan
出处
期刊:Geoderma
[Elsevier]
日期:2023-05-25
卷期号:436: 116528-116528
被引量:23
标识
DOI:10.1016/j.geoderma.2023.116528
摘要
Biochar has gained global attention due to its potential for climate change mitigation and soil quality improvement. Yet, the consequences of biochar additions for soil microbes -the major biotic drivers of soil function- remain unknown across global environmental gradients. We aimed to explore the responses of soil bacterial communities to biochar addition, and further investigate how biochar and soil properties impact these responses. We conducted a global meta-analysis and found that, in general, biochar has a limited impact on the proportion of major bacterial phyla, with only Acidobacteria and Gemmatimonadetes being largely impacted: the relative abundance of Acidobacteria decreased by 14.6%, while that of Gemmatimonadetes increased by 19.8%. Also, the experimental type played a role in shaping the response of microbial community to biochar application. In addition, biochar significantly promoted the diversity of soil bacteria, i.e., genetic richness and diversity. These changes were significantly associated with biochar load, C/N ratio, pyrolysis temperature, biochar pH, as well as soil C/N ratio and pH. We further found that the impacts of biochar on functional diversity, i.e., C substrate richness consumed by soil microbes increased with the biochar load, which might relate to increased genetic richness. Our work suggests that selecting key biochar properties can improve soil quality, microbial function, and climate change mitigation while maintaining the positive impacts of biochar on soil microbial diversity. Further research is needed to link the response of soil microbial composition at the genus level to biochar addition, with microbial functions.
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