生物炭
沼气
化学
残留物(化学)
稻草
甲烷
农学
环境化学
生物化学
生物
有机化学
生态学
热解
作者
Lin Xu,Nanyi Wang,Fanghong Li,Binghua Yan,Junting Pan,Shilin Jiang,Hua Peng,Anwei Chen,Genyi Wu,Jiachao Zhang,Lihua Zhang,Hongli Huang,Lin Luo
标识
DOI:10.1016/j.biortech.2022.127608
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 CO2 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 β-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 α 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 played significant roles in carbon loss and greenhouse emissions caused by biogas residue incorporation during composting.
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