Relative contribution of ammonia-oxidizing bacteria and denitrifying fungi to N2O production during rice straw composting with biochar and biogas residue amendments

Biochar Combined with Garbage Enzyme Enhances Nitrogen Conservation during Sewage Sludge Composting: Evidence from Microbial Community and Enzyme Activities Related to Ammoniation

“…Wu et al [10] also reported that BC promoted the abundance of AOB during the composting of agricultural waste. Lin et al [35] reported that biochar significantly increased the abundance of the AOA gene, and found that N 2 O emissions had an extreme relationship with the abundance of the AOA gene. As the composting process proceeded, the inhibition of GE weakened or was eliminated after the thermophilic phase.…”

“…The initial C/N ratio of composting substrates affects the reproduction of all microorganisms and plays a vital role during the composting process. Lin et al [35] reported that AOB were positively correlated with NH4-N and C/N, while having an opposite correlation with NO3-N.…”

“…The initial C/N ratio of composting substrates affects the reproduction of all microorganisms and plays a vital role during the composting process. Lin et al [35] reported that AOB were positively correlated with NH 4 -N and C/N, while having an opposite correlation with NO 3 -N. In order to analyze the relationships between the three enzymes, eight physiochemical factors, and the detected OTUs (OTU 51 for AOA and OUT 14 for AOB), network analysis was conducted. The yielded nodes for the AOB community in the CK, GE, GE + BC, and GE + PL treatments were only 13, 4, 3, and 3 (Figure S3), while the corresponding nodes for the AOA community were 20, 25, 26, and 22, respectively (Figure 6).…”