Pore size and organic carbon of biochar limit the carbon sequestration potential of Bacillus cereus SR

被引:4
作者
Li, Jie [1 ]
Xie, Ningyi [1 ]
Feng, Changchun [2 ]
Wang, Changquan [1 ]
Huang, Rong [1 ]
Tao, Qi [1 ]
Tang, Xiaoyan [1 ]
Wu, Yingjie [1 ]
Luo, Youlin [1 ]
Li, Qiquan [1 ]
Li, Bing [1 ]
机构
[1] Sichuan Agr Univ, Coll Resources, Chengdu 611130, Peoples R China
[2] China Natl Tobacco Corp Sichuan, Chengdu 610041, Peoples R China
基金
中国国家自然科学基金;
关键词
Carbon-fixing bacteria; Biochar; Rubisco; Survival mode; Carbon sequestration potential; PYROLYSIS TEMPERATURE; RUBISCO GENES; RICE STRAW; DIVERSITY; ABUNDANCE; BIOMASS; SOILS; MINERALIZATION; ASSOCIATION; ADSORBENTS;
D O I
10.1016/j.ecoenv.2024.116229
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Carbon-fixing functional strain-loaded biochar may have significant potential in carbon sequestration given the global warming situation. The carbon-fixing functional strain Bacillus cereus SR was loaded onto rice straw biochar pyrolyzed at different temperatures with the anticipation of clarifying the carbon sequestration performance of this strain on biochar and the interaction effects with biochar. During the culture period, the content of dissolved organic carbon (DOC), easily oxidizable organic carbon, and microbial biomass carbon in biochar changed. This finding indicated that B. cereus SR utilized organic carbon for survival and enhanced carbon sequestration on biochar to increase organic carbon, manifested by changes in CO2 emissions and ribulose-1,5bisphosphate carboxylase/oxygenase (Rubisco) enzyme activity. Linear regression analysis showed that the strain was likely to consume DOC on 300 degrees C biochar, although the Rubisco enzyme activity was higher. In contrast, the strain had a higher carbon sequestration potential on 500 degrees C biochar. Correlation analysis showed that Rubisco enzyme activity was controlled by the physical structure of the biochar. Our results highlight the differences in the survival mode and carbon sequestration potential of B. cereus SR on biochar pyrolyzed at different temperatures.
引用
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页数:9
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