Evaluation of the synergistic effects of biochar and biogas residue on CO2 and CH4 emission, functional genes, and enzyme activity during straw composting
文献类型： 外文期刊
作者： Lin, Xu 1 ; Wang, Nanyi 1 ; Li, Fanghong 1 ; Yan, Binghua 1 ; Pan, Junting 3 ; Jiang, Shilin 1 ; Peng, Hua 5 ; Chen, Anwei 1 ; Wu, Genyi 1 ; Zhang, Jiachao 1 ; Zhang, Lihua 1 ; Huang, Hongli 1 ; Luo, Lin 1 ;
作者机构： 1.Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China
2.Minist Ecol & Environm PR China, South China Inst Environm Sci, State Environm Protect Key Lab Environm Pollut Hlt, Guangzhou 510655, Peoples R China
3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
4.Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410029, Peoples R China
5.Hunan Acad Agr Sci, Hunan Inst Agroenvironm & Ecol, Changsha 410125, Peoples R China
关键词： Composting; Biochar; Biogas residue; Functional gene abundance; Microbial enzyme activity; CO2 and CH4 emission
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.889； 五年影响因子：11.139 ）
ISSN： 0960-8524
年卷期： 2022 年 360 卷
页码：
收录情况： SCI
摘要： This study examined the effects of biochar, biogas residue, and their combined amendments on CO2 and CH4 emission, enzyme activity, and related functional genes during rice straw composting. Results showed that the biogas residue increased CO(2 )and CH4 emissions by 13.07 % and 74.65 %, while biochar had more obvious inhibition. Biogas residue addition enhanced functional gene abundance more than biochar. Biogas residue raised the methanogens mcrA gene by 2.5 times. Biochar improved the Acetyl-CoA synthase and beta-glucosidase activities related to carbon fixation and decreased coenzyme activities related to methanogens. Biochar and biogas residue combined amendments enhanced the acsB gene abundance for CO2 assimilation process and decreased methyl-coenzyme M reductase alpha subunit activity. Pearson correlation analysis indicated that organic matter was the significant variable affecting CO2 and CH4 emissions (P < 0.01). These results indicated biochar
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